00924cam a22002771 4500 gs 44000045 DLC 20260227111349.0 780329s1944 nmuabf b s000 1 eng c gs 44000045 (OCoLC)3760814 U.S. Geol. Survey. Libr. OT WaChenE DLC premarc n-us-nm TN24.N6 A232 no. 20 551.77 Rankin, Charles Harry, 1901- Stratigraphy of the Colorado group, upper Cretaceous, in northern New Mexico, by Charles H. Rankin. Socorro, N.M., 1944. 30 p. front., fold. plates, fold. map. 23 cm. Bulletin no. 20 Bibliographical foot-notes. Geology, Stratigraphic Cretaceous. Geology New Mexico. Bulletin (New Mexico. Bureau of Mines and Mineral Resources) ; no. 20. 27958 27958