- Baldwin, E. M., 1956, Geologic map of the lower Siuslaw River area, Oregon: Oil and Gas Investigation Map 186, 1 map.,
- Bergin, M. J., 1956, Structure and stratigraphy of the Pennsylvanian rocks exposed in the Seitz quadrangle, Breathitt, Magoffin, Morgan, and Wolfe Counties, Kentucky: Oil and Gas Investigation Map 173, 1 map.,
- Cashion, W. B.; Brown, James H., Jr., 1956, Geology of the Bonanza-Dragon oil-shale area, Uintah County, Utah, and Rio Blanco County, Colorado: Oil and Gas Investigation Map 153, 1 map ;120 x 98 cm.,
- Harbour, R. L.; Dixon, G. H., 1956, Geology of the Trinidad-Aguilar area, Las Animas and Huerfano Counties, Colorado: Oil and Gas Investigation Map 174, 1 map :col. ;117 x 70 cm. folded to 28 x 20 cm. in envelope 30 x 24 cm. (See also Bulletin 1072-G),
- Murphy, John F.; Privarasky, N. C.; Moerlein, G. A., 1956, Geology of the Sheldon-Little Dome area, Fremont County, Wyoming: Oil and Gas Investigation Map 181, 1 map.,
- Ray, Richard G.; Kent, Bion H.; Dane, C. H., 1956, Stratigraphy and photogeology of the southwestern part of Uinta Basin, Duchesne and Uintah Counties, Utah: Oil and Gas Investigation Map 171, 1 map.,
- Stipp, Thomas F.; Haigler, Leon Boyd, 1956, Preliminary structure contour map of a part of southeastern New Mexico showing oil and gas development: Oil and Gas Investigation Map 177, 1 map.,
- Strobell, J. D., Jr., 1956, Geology of the Carrizo Mountains area in northeastern Arizona and northwestern New Mexico: Oil and Gas Investigation Map 160, 1 map :col. ;105 x 93 cm. on sheet 108 x 102 cm. +1 chart (57 x 77 cm. on sheet 108 x 102 cm.),
- Van Houten, Franklyn B.; Weitz, Joseph Leonard, 1956, Geologic map of the eastern Beaver Divide-Gas Hills area, Fremont and Natrona Counties, Wyoming: Oil and Gas Investigation Map 180, 1 map.,
- Zapp, Alfred Dexter, 1956, Structure contour map of the Tensleep sandstone in the Big Horn Basin, Wyoming and Montana: Oil and Gas Investigation Map 182, 2 maps :col. ;88 x 75 cm. or smaller.,
