00653cam a22002051a 4500 gs 15000417 DLC 20260227111317.0 821106s1915 iaud s000 0 eng c gs 15000417 (OCoLC)8932357 U.S. Geol. Surv. Library OrCS OrCS DLC QE654 .K49 Keyes, Charles Rollin, 1864-1942. Terrainal differentiation of the Paleozoic succession / by Charles Keyes. Des Moines : R. Henderson, state printer, 1915. [2 p.] : 1 fold. chart ; 25 cm. Geology Iowa. Geology, Stratigraphic. 25523 25523