- Hughes, Peter E.; Hannuksela, J. S.; Danchuk, W. J., 1981, Flood of July 1-5, 1978 on the Kickapoo River, southwestern Wisconsin: Hydrologic Atlas 653, 6 maps on seven sheets :col. ;sheets 65 x 95 cm.,
- Luckey, Richard R.; Gutentag, Edwin D.; Weeks, John B., 1981, Water-level and saturated-thickness changes, predevelopment to 1980, in the High Plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming: Hydrologic Atlas 652, 2 maps :col. ;54 x 38 cm. on sheets 73 x 104 cm.,
- Robson, Stanley G., 1981, Geologic structure, hydrology, and water quality of the Laramie-Fox Hills aquifer in the Denver Basin, Colorado: Hydrologic Atlas 650, 10 maps :col. ;41 x 27 cm. on 3 sheets 113 x 89 cm. or smaller.,
- Robson, Stanley G.; Romero, John C., 1981, Geologic structure, hydrology, and water quality of the Dawson aquifer in the Denver basin, Colorado: Hydrologic Atlas 643, 12 maps :col. ;on 3 sheets 112 x 74 cm. folded to 23 x 22 cm. in envelope 30 x 24 cm.,
- Robson, Stanley G.; Romero, John C., 1981, Geologic structure, hydrology, and water quality of the Denver aquifer in the Denver basin, Colorado: Hydrologic Atlas 646, 10 maps :col. ;on 3 sheets 93 x 70 cm. or smaller, folded to 23 x 19 cm., in envelope 30 x 24 cm.,
- Robson, Stanley G.; Romero, John C.; Zawistowski, Stanley, 1981, Geologic structure, hydrology, and water quality of the Arapahoe aquifer in the Denver Basin, Colorado: Hydrologic Atlas 647, 11 maps on 3 sheets :col. ;41 x 27 cm. or smaller on sheets 104 x 90 cm. or smaller.,
- Weeks, John B.; Gutentag, Edwin D., 1981, Bedrock geology, altitude of base, and 1980 saturated thickness of the high plains aquifer in parts of Colorado, Kansas, Nebraska, New Mexico, Oklahoma, South Dakota, Texas, and Wyoming: Hydrologic Atlas 648, 2 maps :col. ;on sheets 73 x 104 cm. folded to 18 x 26 in envelope 30 x 24 cm.,
