00930cam a22002651 4500 gs 42000063 DLC 20260227111347.0 760903s1940 cc abf 000 0 eng c gs 42000063 (OCoLC)2413924 U.S. Geol. survey. Library CCC OCoLC DLC premarc QE721 .G8 Grabau, Amadeus W. (Amadeus William), 1870-1946. The rhythm of the ages; earth history in the light of the pulsation and polar control theories, by Amadeus W. Grabau. Peking, H. Vetch, 1940. xvii, 561 p. illus., xxv pl. (incl. front., maps (part fold.)) 26 cm. "First edition, January 1940." "Literature references": p. 515-524. Paleontology. Earth movements. Glacial epoch. Pulsation and polar control theories. 27771 27771