00971cam a22002531 4500 gs 28000376 DLC 20260227111333.0 790807s1928 kyuab 000 0 eng c gs 28000376 (OCoLC)5248974 Library, U. S. Geological Survey OCl DLC premarc QE115 .A3 ser. 6, no. 21 F457.M2 L8 Lobeck, A. K. (Armin Kohl), 1886-1958. The geology and physiography of the Mammoth Cave national park, by Armin Kohl Lobeck. Illustrated with thirty-nine photographs, maps, and diagrams. Frankfort, Ky., The Kentucky Geological survey, 1928. 7 p. l., 69 p. incl. front., illus., maps, diagrs. 23 cm. Kentucky. Geological survey. Ser. VI. Pamphlet XXI Geology Kentucky Mammoth Cave. Mammoth Cave (Ky.) Physical geography Kentucky Mammoth Cave. 26672 26672