- Biesecker, James E.; George, J. Richard., 1966, Stream quality in Appalachia as related to coal-mine drainage, 1965: [U.S. Geological Survey], Circular 526, iv, 27 p. :tables, graphs, maps (including 1 folding. in pocket) ;27 cm.,
- Bryant, Bruce; Reed, John Calvin., 1966, Mineral resources of the Grandfather Mountain window and vicinity, North Carolina: Dept. of the Interior, Geological Survey, Circular 521, 13 p. :maps ;27 cm.,
- Durum, W. H.; Langbein, Walter Basil, 1966, Water quality of the Potomac River estuary at Washington, D.C.: U.S. Geological Survey, Circular 529-A, 9 p. :ill., map ;27 cm.,
- Erickson, Ralph Leroy; Van Sickle, G. H.; Nakagawa, H. M.; McCarthy, J. H.; Leong, K. W., 1966, Gold geochemical anomaly in the Cortez district, Nevada: [U.S. Geological Survey], Circular 534, 9 p. :illus., maps. ;27 cm.,
- Gott, Garland B.; McCarthy, J. H., 1966, Distribution of gold, silver, tellurium, and mercury in the Ely Mining District, White Pine County, Nevada: U.S. Geological Survey, Circular 535, 5 p. :folded maps ;27 cm.,
- Hackett, O. M., 1966, Ground-water research in the United States: U. S. Govt. Print. Off., Circular 527, 8 p. ;27 cm.,
- Heath, Ralph C.; Foxworthy, B. L.; Cohen, Philip M., 1966, The changing pattern of ground-water development on Long Island, New York: [U.S. Geological Survey], Circular 524, iii, 10 p. :illus., maps. ;27 cm.,
- McCulloh, Thane Hubert, 1966, Gravimetric effects of petroleum accumulations--A preliminary summary: [U.S. Geological Survey], Circular 530, iii, 4 p. ;27 cm.,
- McCulloh, Thane Hubert, 1966, The promise of precise borehole gravimetry in petroleum exploration and exploitation: [U.S. Geological Survey], Circular 531, iii, 12 p. :illus. ;27 cm.,
- Meyer, Gerald; Wyrick, Granville G., 1966, Regional trends in water-well drilling in the United States: [U.S. Geological Survey], Circular 533, 8 p. :illus., maps. ;26 cm.,
- Radbruch-Hall, Dorothy H.; Bonilla, M. G., 1966, Tectonic creep in the Hayward fault zone, California: [U.S. Geological Survey], Circular 525, vi, 13 p. :illus., maps. ;27 cm.,
- Robertson, Eugene C., 1966, The interior of the Earth, an elementary description: [U.S. Geological Survey], Circular 532, iii, 10 p. :illus. ;26 cm.,
- Stewart, G. L.; Hoffman, C. M., 1966, Tritium rainout over the United States in 1962 and 1963: U.S. Dept. of the Interior, Geological Survey, Circular 520, iii, 11 p. :ill. ;26 cm.,
- Weld, Betsy A.; Griffin, Margaret S.; Brett, George W., 1966, Reports and maps of the Geological Survey released only in the open files, 1965: U.S. Dept. of the Interior, Geological Survey, Circular 518, 16 p. ;26 cm.,
