01085cam a22003011 4500 gs 61000181 DLC 20260227111410.0 780320s1960 dcuabd b f000 0 eng gs 61000181 (OCoLC)3733367 DLC OClU ISS OCoLC DLC QE75 .P9 no. 328 QE79 .S5 557.82 I 19.16:328 Simpson, Howard Edwin, 1917- Geology of the Yankton area, South Dakota and Nebraska. Washington, U.S. Govt. Print. Off., 1960. 124 p. illus., maps (part fold., part col.) diagrs., profile, tables. 29 cm. Geological Survey (U.S.). Professional paper, 328 Part of illustrative matter in pocket. Prepared as part of the program of the Dept. of the Interior for the development of the Missouri River Basin. Bibliography: p. 118-121. Geology South Dakota Geology Nebraska Yankton area, South Dakota and Nebraska. 29532 29532