- Allen, Howard E., 1968, Floods in Woodstock Quadrangle, Northeastern Illinois: Hydrologic Atlas 256, 1 col. map ;58 x 43 cm., on sheet 86 x 124 cm.,
- Allen, Howard E., 1968, Floods in Beecher West Quadrangle, Northeastern Illinois: Hydrologic Atlas 257, 1 col. map ;58 x 44 cm., on sheet 81 x 138 cm.,
- Allen, Howard E., 1968, Floods in Dyer Quadrangle, Northeastern Illinois: Hydrologic Atlas 301, 1 col. map ;58 x 44 cm., on sheet 77 x 122 cm.,
- Barnwell, William W.; Boning, Charles W., 1968, Water resources and surficial geology of the Mendenhall Valley, Alaska: Hydrologic Atlas 259, 1 map.,
- Cotter, R. D.; Bidwell, L. E., 1968, Water resources of the Lac Qui Parle River Watershed, Southwestern Minnesota: Hydrologic Atlas 269, col. maps on 4 sheets ;71 x 83 cm. or smaller folded in envelope 30 x 24 cm.,
- Cotter, R. D.; Bidwell, L. E.; Van Toast, W. A.; Novitzki, R. P., 1968, Water resources of the Chippewa River Watershed, West-central Minnesota: Hydrologic Atlas 286, col. maps on 4 sheets ;102 x 86 cm. or smaller folded in envelope 30 x 24 cm.,
- Davis, R. W., 1968, Availability of ground water in parts of the Arlington and Wickliffe SW quadrangles in Jackson Purchase region, Kentucky: Hydrologic Atlas 183, 1 map.,
- DeBuchananne, George D., 1968, Ground-water resources of the James, York, and Rappahannock River Basins of Virginia west of the fall line: Hydrologic Atlas 283, map on sheet 61 x 108 cm. fold. in envelope 30 cm.,
- DeBuchananne, George D., 1968, Ground-water resources of the eastern shore of Virginia and the James, York, and Rappahannock river basins of Virginia east of the fall line: Hydrologic Atlas 284, 2 maps on sheet 112 x 61 cm. fold. in envelope 30 cm.,
- Denis, Louis P., 1968, Flood of August 1966 at Carlsbad, New Mexico: Hydrologic Atlas 318, 1 map.,
- Emmett, Leo F.; Jeffery, H. G., 1968, Reconnaissance of the ground-water resources of the Missouri River alluvium between St. Charles and Jefferson City, Missouri: Hydrologic Atlas 315, 1 map.,
- Haire, William J., 1968, Floods on Boone and Winkler Creeks at Boone, North Carolina: Hydrologic Atlas 323, 1 map.,
- Hansen, Arnold J., 1968, Availability of ground water in the Oakton quadrangle, and part of the Wolf Island quadrangle in Jackson Purchase region, Kentucky: Hydrologic Atlas 182, 1 map.,
- Hansen, Arnold J., 1968, Availability of ground water in the Blandville quadrangle, Jackson Purchase region, Kentucky: Hydrologic Atlas 184, 1 map.,
- Hansen, Arnold J., 1968, Availability of ground water in parts of the Cairo and Barlow quadrangles in the Jackson Purchase region, Kentucky: Hydrologic Atlas 186, 1 map.,
- Harris, David Dell, 1968, Travel rates of water for selected streams in the Willamette River basin, Oregon: Hydrologic Atlas 273, 1 map.,
- Hickenlooper, Irby J., 1968, Floods at Arecibo, Puerto Rico: Hydrologic Atlas 271, 1 map.,
- Hickenlooper, Irby J., 1968, Floods in the Mayaguez area of Puerto Rico: Hydrologic Atlas 288, 1 map.,
- Hickenlooper, Irby J., 1968, Floods in the area of Vega Alta and Vega Baja, Puerto Rico: Hydrologic Atlas 289, 1 map.,
- Hladio, Stephen, 1968, Floods on Chenango River and Canasawacta Creek at Norwich, New York: Hydrologic Atlas 297, 1 map.,
- Jungmann, William L.; Williams, C. C., 1968, Geology and ground water in Labette County, Kansas: Hydrologic Atlas 279, 1 col. map ;64 x 67 cm.,
- Keech, Charles Franklin; Dreeszen, V. H., 1968, Availability of ground water in Adams County, Nebraska: Hydrologic Atlas 287, 1 map.,
- Lambert, T. William, 1968, Availability of ground water in the Hickman quadrangle, Kentucky-Missouri-Tennessee: Hydrologic Atlas 181, 1 map.,
- Lambert, T. William, 1968, Availability of ground water in the parts of the Wickliffe and Wickliffe NW quadrangles in Jackson Purchase region, Kentucky: Hydrologic Atlas 185, 1 map.,
- Lee, R.; Chang, W. C. F., 1968, Floods in Waimanalo area, Oahu, Hawaii: Hydrologic Atlas 314, 1 map.,
- Lindholm, Gerald F., 1968, Geology and water resources of the Hibbing area, northeastern Minnesota: Hydrologic Atlas 280, 5 maps :col. ;on 3 sheets 104 x 120 cm. or smaller in folded in envelope 30 x 24 cm.,
- Lloyd, Orville B., 1968, Ground-water resources of Chowan County, North Carolina: Hydrologic Atlas 292, 7 maps :col. ;on sheet 68 x 72 cm., folded in envelope 30 x 24 cm.,
- Maclay, R. W.; Winter, Thomas C.; Bidwell, L. E., 1968, Water resources of the Mustinka and Bois de Sioux Watershed, West-central Minnesota: Hydrologic Atlas 272, col. maps on 4 sheets ;94 x 115 cm. or smaller folded in envelope 30 x 24 cm.,
- Mycyk, Roman T.; Walter, Gerald L., 1968, Floods in McHenry Quadrangle, Northeastern Illinois: Hydrologic Atlas 255, 1 col. map ;58 x 43 cm., on sheet 80 x 122 cm.,
- Norvitch, Ralph F.; Farrell, D. F.; Pauszek, F. H.; Petersen, R. G., 1968, Hydrology and water resources of the Housatonic River Basin, Massachusetts: Hydrologic Atlas 281, 4 col. maps ;73-95 x 86-119 cm.,
- Oakes, Edward L.; Bidwell, L. E., 1968, Water resources of the Mississippi Headwaters Watershed, North-central Minnesota: Hydrologic Atlas 278, col. maps on 4 sheets ;108 x 99 cm. or smaller folded in envelope 30 x 24 cm.,
- Olcott, Perry G., 1968, Water resources of Wisconsin, Fox-Wolf River basin: Hydrologic Atlas 321, 14 col. maps on 4 sheets ;97 x 73 cm. fold. in envelope 30 x 24 cm.,
- Oster, E. A., 1968, Patterns of runoff in the Willamette Basin, Oregon: Hydrologic Atlas 274, 1 map.,
- Osterkamp, W. R., 1968, Occurrence of ground water in the Judith River Formation, north-central Montana: Hydrologic Atlas 308, 1 map.,
- Prescott, Glenn C., 1968, Ground water favorability areas and surficial geology of the lower Androscoggin River basin, Maine: Hydrologic Atlas 285, 1 map :col. ;104 x 134 cm. folded in envelope 27 x 21 cm.,
- Rantz, S. E., 1968, Average annual precipitation and runoff in north coastal California: Hydrologic Atlas 298, 4 maps on one sheet :col. ;115 x 73 cm.,
- Rapp, Donald H., 1968, Floods on Johns and Craig Creeks in Craig County, Virginia: Hydrologic Atlas 326, 1 map.,
- Sumsion, C. T., 1968, Summary of the geology and ground-water resources of Pitt County, North Carolina: Hydrologic Atlas 291, 1 map.,
- Waller, Roger M.; Feulner, Alvin J.; Morris, Donald Arthur, 1968, Water resources and surficial geology of the Homer area, southcentral Alaska: Hydrologic Atlas 187, 1 map.,
- Webber, Earl E.; Mayo, Ronald I., 1968, Floods at Jackson, Ohio: Hydrologic Atlas 325, 1 map.,
- Weigle, James Montgomery, 1968, Ground-water resources of the lower Merrimack River valley, south-central New Hampshire: Hydrologic Atlas 277, 1 map.,
- Welder, G. E., 1968, Ground-water reconnaissance of the Green River basin, southwestern Wyoming: Hydrologic Atlas 290, 1 map on 2 sheets.,
- Whitcomb, Harold A.; Lowry, M. E., 1968, Ground-water resources and geology of the Wind River Basin area, central Wyoming: Hydrologic Atlas 270, 2 maps on 2 sheets :1 col. ;75 x 112 cm. on sheets 91 x 124 cm. folded to 26 x 19 cm. in envelope 30 x 24 cm. +text (13 p. ; 27 cm.) and generalized section (1 sheet ; 38 x 76 cm. folded to 26 x 19 cm.),
- Williams, John R., 1968, Availability of ground water in the northern part, Ten Mile and Taunton River Basins, Southeastern Massachusetts: Hydrologic Atlas 300, 1 col. map ;102 x 109 cm.,
- Winslow, Allen George; Hillier, Donald E.; Turcan, A. N., 1968, Saline ground water in Louisiana: Hydrologic Atlas 310, 4 col. maps ;62 x 68 cm.,
- Wyrick, Granville G., 1968, Ground-water resources of the Appalachian region: Hydrologic Atlas 295, 8 maps :col. ;39 x 45 cm. on 4 sheets 99 x 71 cm.,
