00980cam a22002891 4500 gs 63000247 DLC 20260227111412.0 821018s1962 dcuab b f000 0 eng c gs 63000247 (OCoLC)8870868 U.S. Geol. Survey. Libr. MsSM DLC premarc n-us-nd QE75 .C5 no. 472 Shjeflo, Jelmer B., 1911- Current studies of the hydrology of prairie potholes, by J.B. Shjeflo and others. Washington, 1962 [i.e. 1963] iii, 11 p. illus., map, diagr., table. 26cm. Geological Survey (U.S.). Circular, 472 "Prepared as part of a program of the Department of the Interior for development of the Missouri River basin." Bibliography: p. 11 Potholes. Prairies. Lakes North Dakota. Hydrology of prairie potholes. 29725 29725