Condra, Geo. E. (George Evert) 1869-1958 creator text nbu Lincoln University of Nebraska Conservation and Survey Division 1950 1947 [Rev.] monographic eng

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74 p. illus., fold. plate, maps, tables. 25 cm. by G. E. Condra, E. C. Reed, and E. D. Gordon. Bibliography: p. 70-72. Geology Nebraska Geology, Stratigraphic Pleistocene QE135 .A4 no. 15-A gs 54000001 DLC 780216 20260227111401.0 gs 54000001