- Arcement, G. J.; Dantin, L. J.; Garrison, C. R.; Lovelace, W. M., 1991, Water Resources Data, Louisiana, Water Year 1990: Water Data Report LA-90-1, 419 p.,
- Barker, R. G.; Ragland, B. C.; Rhinehardt, J. F.; Eddins, W. H., 1991, Water Resources Data, North Carolina, Water Year 1991: Water Data Report NC-91-1, 364 p.,
- Bartlett, Jr., W. P.; Higgins, W. B.; Lippert, R. G., 1991, Water Resources Data, Maine, Water Year 1991: Water Data Report ME-91-1, 187 p.,
- Bauersfeld, W. R.; Jones, W. D.; Pustay, E. A., 1991, Water Resources Data, New Jersey, Water Year 1990. Volume 2. Ground-Water Data: U.S. Geological Survey Water Data Report NJ-90-2, viii, 178 p.,
- Bauersfeld, W. R.; Moshinsky, E. W.; Pustay; E. A., 1991, Water Resources Data, New Jersey, Water Year 1990. Volume 1. Surface-Water Data: Water Data Report NJ-90-1, 436 p.,
- Bennett, C. S.; Cooney, T. W.; Jones, K. H.; Conrads, P. A., 1991, Water Resources Data, South Carolina, Water Year 1990: Water Data Report SC-90-1, 509 p.,
- Blazs, R. L.; Walters, D. M.; Coffey, T. E.; White, D. K.; Boyle, D. L., 1991, Water Resources Data, Oklahoma, Water Year 1990: Water Data Report OK-90-1, 517 p.,
- Blumer, S. P.; Larson, W. W.; Minnerick, R. J.; Whited, C. R.; LeuVoy, R. L., 1991, Water Resources Data, Michigan, Water Year 1990: Water Data Report MI-90-1, 281 p.,
- Boner, F. C.; Konieczki, A. D.; Davis, R. G., 1991, Water Resources Data, Arizona, Water Year 1990: Water Data Report AZ-90-1, 381 p.,
- Boohar, J. A.; Hoy, C. G.; Steele G. V., 1991, Water resources data, Nebraska, Water Year 1990: Water Data Report NE-90-1, 334 p.,
- Bostic, Robert E.; Hitch, Daniel; Van Gordon, Lloyd; Swanson, Robert, 1991, Water Resources Data, Nevada, Water Year 1990: Water Data Report NV-90-1, 358 p.,
- Bowers, J. C.; Jensen, R. M.; Hoffman, E. B., 1991, Water Resources Data, California, Water Year 1990. Volume 1. Southern Great Basin from Mexican Border to Mono Lake Basin; and Pacific Slope Basins from Tijuana River to Santa Maria River: U.S. Geological Survey, Water Resources Division Water Data Report CA-90-1, xi, 300 p.,
- Buckner, H. D.; Shelby, W. J., 1991, Water Resources Data, Texas, Water Year 1990. Volume 1. Arkansas River Basin; Red River Basin; Sabine River Basin; Neches River Basin; and Intervening Coastal Basins: Water Data Report TX-90-1, 462 p.,
- Buckner, H. D.; Shelby, W. J., 1991, Water Resources Data, Texas, Water Year 1990. Volume 2. Trinity River Basin: Water Data Report TX-90-2, 377 p.,
- Buckner, H. D.; Shelby, W. J., 1991, Water Resources Data, Texas, Water Year 1990. Volume 3. San Jacinto River Basin; Brazos River Basin; San Bernard River Basin; and Intervening Coastal Basins: Water Data Report TX-90-3, 453 p.,
- Burr, M. J.; Benson, R. D.; Hansen, D. S., 1991, Water Resources Data, South Dakota, Water Year 1991: Water Data Report SD-90-1, 394 p.,
- Campbell, J. B.; Szabo, C. O.; Sherwood, D. A.; Deloff, D. D., 1991, Water Resources Data, New York, Water Year 1990. Volume 3. Western New York: Water Data Report NY-90-3, 202 p.,
- Cervione, M. A., Jr.; Davies, B. S., III; Bohr, J. R.; Hunter, B. W., 1991, Water Resources Data, Connecticut, Water Year 1990: Water Data Report CT-90-1, 265 p.,
- Curtis, R. E., Jr.; Aquino, Zaida; Diaz, P. L.; Vachier, Ricardo, 1991, Water resources data, Puerto Rico and the U.S. Virgin Islands, Water Year 1990: Water Data Report PR-90-1, 514 p.,
- Druse, S. A.; Glass, W. R.; Peterson, D. A.; Smalley, M. L., 1991, Water Resources Data, Wyoming, Water Year 1990: Water Data Report WY-90-1, 494 p.,
- Firda, G. D.; Lumia, Richard; Murray, P. M., 1991, Water Resources Data, New York, Water Year 1990; Volume 1. Eastern New York; Excluding Long Island: Water Data Report NY-90-1, 256 p.,
- Flohr, D. F.; Counts, P. H.; Edwards, F. D.; Garrett, J. W., 1991, Water Resources Data, Tennessee, Water Year 1990: Water Data Report TN-90-1, 270 p.,
- Gandara, S. C.; Buckner, H. D., 1991, Water Resources Data, Texas, Water Year 1991. Volume 4. Colorado River Basin; Lavaca River Basin; and Intervening Coastal Basins: Water Data Report TX-91-4, 222 p.,
- Geiger, C. O.; Lacock, D. L.; Schneider, D. R.; Carlson, M. D.; Pabst, B. J., 1991, Water Resources Data, Kansas, Water Year 1990: Water Data Report KS-90-1, 370 p.,
- Geological Survey (U.S.), 1991, Water Resources Data, Florida, Water Year 1990. Volume 1A. Northeast Florida Surface Water: Water Data Report FL-90-1A, 460 p.,
- Geological Survey (U.S.), 1991, Water Resources Data, Florida, Water Year 1990. Volume 3A. Southwest Florida Surface Water: Water Data Report FL-90-3A, 292 p.,
- Geological Survey (U.S.), 1991, Water Resources Data, Florida, Water Year 1990. Volume 3B. Southwest Florida Ground Water: Water Data Report FL-90-3B, 248 p.,
- Geological Survey (U.S.), 1991, Water Resources Data, Florida, Water Year 1991. Volume 1B. Northeast Florida Ground Water: Water Data Report FL-91-1B, 336 p.,
- Gunard, K. T.; Hess, J. H.; Zirbel, J. L.; Cornelius; C. E., 1991, Water Resources Data, Minnesota, Water Year 1990. Volume 1. Great Lakes and Souris-Red-Rainy River Basins: Water Data Report MN-90-1, 140 p.,
- Gunard, K. T.; Hess, J. H.; Zirbel, J. L.; Cornelius; C. E., 1991, Water Resources Data, Minnesota, Water Year 1990. Volume 2. Upper Mississippi and Missouri River Basins: Water Data Report MN-90-2, 365 p.,
- Haire, W. J.; Lietz, A. C., 1991, Water Resources Data, Florida, Water Year 1990. Volume 2B. South Florida Ground Water: Water Data Report FL-90-2B, 431 p.,
- Haire, W. J.; Price, C., 1991, Water Resources Data, Florida, Water Year 1990. Volume 2A. South Florida Surface Water: Water Data Report FL-90-2A, 215 p.,
- Harenberg, W. A.; Jones, M. L.; O'Dell, I.; Brennan, T. S.; Lehmann, A. K., 1991, Water Resources Data, Idaho, Water Year 1990: Water Data Report ID-90-1, 659 p.,
- Harkness, R. E.; Haffield, N. D.; Berkas, W. R., 1991, Water Resources Data, North Dakota, Water Year 1990: Water Data Report ND-90-1, 362 p.,
- Holmstrom, B. K.; Kammerer, P. A.; Erickson, R. M., 1991, Water Resources Data, Wisconsin, Water Year 1990: Water Data Report WI-90-1, 592 p.,
- Hubbard, L. E.; Herrett, T. A.; Kraus, R. L.; Kroll, C. G., 1991, Water Resources Data, Oregon, Water Year 1990. Volume 2. Western Oregon: Water Data Report OR-90-2, 351 p.,
- Hubbard, L. E.; Kroll, C. G.; Herrett, T. A.; Kraus, R. L.; Ruppert, G. P., 1991, Water Resources Data, Oregon, Water Year 1990. Volume 1. Eastern Oregon: Water Data Report OR-90-1, 206 p.,
- Hunter, T. C.; Mullen, J. R.; Anderson, S. W., 1991, Water Resources Data, California, Water Year 1990. Volume 3. Southern Central Valley Basins and the Great Basin from Walker River to Truckee River: U.S. Geological Survey, Water Resources Division Water Data Report CA-90-3, v, 415 p.,
- James, R. W.; Hornlein, J. F.; Simmons, R. H.; Smigaj, M. J., 1991, Water Resources Data, Maryland and Delaware, Water Year 1990. Volume 2: Ground-Water Data: Water Data Report MD-DE-90-2, 252 p.,
- James, R. W.; Hornlein, J. F.; Strain, B. F.; Smigaj, M. J., 1991, Water Resources Data, Maryland and Delaware, Water Year 1990. Volume 1: Surface-Water Data: Water Data Report MD-DE-90-1, 524 p.,
- Johnson, J. A.; Fong-Frydendal, L. J.; Baker, J. B., 1991, Water Resources Data, California, Water Year 1990. Volume 5. Ground-Water Data: U.S. Geological Survey, Water Resources Division Water Data Report CA-90-5, v, 396 p.,
- Kolva, J. R.; White, T. E.; Druther, R. L.; White, K. E., 1991, Water Resources Data, Pennsylvania, Water Year 1990. Volume 1. Delaware River Basin: Water Data Report PA-90-1, 297 p.,
- Lamke, R. D.; Bigelow, B. B.; Van Maanen, J. L.; Kemnitz, R. T.; Novcaski, K. M., 1991, Water Resources Data, Alaska, Water Year 1990: Water Data Report AK-90-1, 265 p.,
- Lescinsky, J. B.; Coll, M. B.; Siwicki, R. W., 1991, Water Resources Data, Pennsylvania, Water Year 1990. Volume 3. Ohio and St. Lawrence River Basins: Water Data Report PA-90-3, 163 p.,
- Loper, W. C.; Durlin, R. R.; Schaffstall, W. P., 1991, Water Resources Data, Pennsylvania, Water Year 1990. Volume 2. Susquehanna and Potomac River Basins: Water Data Report PA-90-2, 277 p.,
- Matsuoka, I.; Tateishi, G. A.; Lum, M. G. H. S.; Kunishige, V. E., 1991, Water Resources Data, Hawaii and other Pacific Areas, Water Year 1990. Volume 1. Hawaii: Water Data Report HI-90-1, 303 p.,
- Maurer, J. C.; Sterling, J. M.; Richards, T. E.; Hayes, P. D., 1991, Water Resources Data, Illinois, Water Year 1990, Vol. 1: Water Data Report IL-90-1, NA,
- McClain, D. L.; Byrd, F. D.; Brown, A. C., 1991, Water Resources Data, Kentucky, Water Year 1990: Water Data Report KY-90-1, 439 p.,
- Meadows, P. E.; Martin, J. B.; Mixson, P. R., 1991, Water Resources Data, Florida, Water Year 1991. Volume 4: Northwest Florida: Water Data Report FL-91-4, 196 p.,
- Miles, M. B.; Wiggins, W. D.; Ruppert, G. P.; Blaz, R. L.; Reed, L. L.; Hubbard, L. E., 1991, Water Resources Data, Washington, Water Year 1990: Geological Survey (U.S.) Water Data Report WA-90-1, 459 p.,
- Mullen, J. R.; Shelton, W. F.; Markham, K. L.; Anderson, S. W., 1991, Water Resources Data, California, Water Year 1990. Volume 4. Northern Central Valley Basins and the Great Basin from Honey Lake Basin to Oregon State Line: U.S. Geological Survey, Water Resources Division Water Data Report CA-90-4, v, 338 p.,
- Pearman, J. L.; Sedberry, F. C.; Stricklin, V. E.; Cole, P. W., 1991, Water Resources Data, Alabama, Water Year 1990: Water Data Report AL-90-1, 418 p.,
- Plunkett, M. L.; Morris, F.; Oakley, W. T., 1991, Water Resources Data, Mississippi, Water Year 1990: Water Data Report MS-90-1, 398 p.,
- Porter, J. E.; Westerfield, P. W.; Lambert, B. F., 1991, Water Resources Data, Arkansas, Water Year 1990: Water Data Report AR-90-1, 596 p.,
- Prugh, B. J.; Easton, F. J., 1991, Water Resources Data, Virginia, Water Year 1990. Volume 2: Ground-Water Level and Ground-Water Quality Records: Water Data Report VA-90-2, 400 p.,
- Prugh, B. J.; Easton, F. J.; Belval, D. L., 1991, Water Resources Data, Virginia, Water Year 1990. Volume 1. Surface-Water Discharge and Surface-Water Quality Records: Water Data Report VA-90-1, 418 p.,
- Ragland, B. C.; Barker, R. G.; Eddins, W. H.; Rinehardt, J. F., 1991, Water Resources Data, North Carolina, Water Year 1990: Water Data Report NC-90-1, 409 p.,
- ReMillard, M. D.; Herbert, L. R.; Birdwell, G. A.; Lockner, T. K., 1991, Water Resources Data, Utah, Water Year 1990: Water Data Report UT-90-1, 404 p.,
- Reed, H. L.; Hatten, D. O.; Perkins, T. J.; Gray, Jr., G. L.; Davis, J. V., 1991, Water Resources Data, Missouri, Water Year 1990: Water Data Report MO-90-1, 304 p.,
- Richards, T. E.; Hayes, P. D.; Sullivan, D. J., 1991, Water Resources Data, Illinois, Water Year 1990, Vol. 2: Water Data Report IL-90-2, NA,
- Shelton, W. F.; Trujillo, L. F.; Markham, K. L.; Palmer, J. R., 1991, Water Resources Data, California, Water Year 1990. Volume 2. Pacific Slope Basins from Arroyo Grande to Oregon State Line except Central Valley: U.S. Geological Survey, Water Resources Division Water Data Report CA-90-2, v., 345 p.,
- Shields, R. R.; Knapton, J. R.; White, M. K.; Brosten, T. M.; Reed; T. E., 1991, Water Resources Data, Montana, Water Year 1990: Water Data Report MT-90-1, 540 p.,
- Shindel, H. L.; Klingler, J. H.; Mangus, J. P.; Trimble, L. E., 1991, Water Resources Data, Ohio, Water Year 1990. Volume 1. Ohio River Basin Excluding Project Data: Water Data Report OH-90-1, 320 p.,
- Shindel, H. L.; Klingler, J. H.; Mangus, J. P.; Trimble, L. E., 1991, Water Resources Data, Ohio, Water Year 1990. Volume 2. St. Lawrence River Basin and Statewide Project Data: Water Data Report OH-90-2, 293 p.,
- Socolow, R. S.; Gadoury, R. A.; Ramsbey, L. R.; Bell, R. W., 1991, Water Resources Data, Massachusetts and Rhode Island, Water Year 1989: Water Data Report MA-RI-89-1, 227 p.,
- Socolow, R. S.; Gadoury, R. A.; Ramsbey, L. R.; Bell, R. W., 1991, Water Resources Data, Massachusetts and Rhode Island, Water Year 1990: Water Data Report MA-RI-90-1, 260 p.,
- Spinello, A. G.; Nakao, J. H.; Busciolano, R.; Winowitch, R. B.; Eagen, V. K., 1991, Water Resources Data, New York, Water Year 1990. Volume 2. Long Island: Water Data Report NY-90-2, 204 p.,
- Stewart, J. A.; Nell, G. E., 1991, Water Resources Data, Indiana, Water Year 1990: Water Data Report IN-90-1, 358 p.,
- Stokes, W. R.; McFarlane, R. D.; Buell, G. R., 1991, Water Resources Data, Georgia, Water Year 1990: Water Data Report GA-90-1, 471 p.,
- Toppin, K. W.; McKenna, K. E.; Cotton, J. E.; Denner, J. C., 1991, Water Resources Data, New Hampshire and Vermont, Water Year 1990: Water Data Report NH-VT-90-1, 148 p.,
- Ugland, R. C.; Cochran, B. J.; Hiner, M. M.; Steger, R. D., 1991, Water Resources Data, Colorado, Water Year 1990. Volume 1. Missouri River Basin; Arkansas River Basin; and Rio Grande Basin: Water Data Report CO-90-1, 498 p.,
- Ugland, R. C.; Cochran, B. J.; Kretschman, R. G.; Wilson, E. A.; Bennett, J. D., 1991, Water Resources Data, Colorado, Water Year 1990. Volume 2. Colorado River Basin: Water Data Report CO-90-2, 403 p.,
- Ward, S. M.; Hobba, W. A.; Taylor, F. M.; Waldron, M. C., 1991, Water Resources Data, West Virginia, Water Year 1990: Water Data Report WV-90-1, 190 p.,
