01225cam a22003131 4500 gs 31000269 DLC 20260227111336.0 790928s1931 dcuabf b f001 0 eng c gs 31000269 (OCoLC)5435866 Library, U. S. Geological Survey NNBG NNBG ISS OCoLC DLC premarc QE75 .P9 no. 168 I 19.16:168 Bradley, Wilmot Hyde, 1899- Origin and microfossils of the oil shale of the Green River formation of Colorado and Utah, by Wilmot H. Bradley. Washington, U.S. Govt. Print. Off., 1931. vi, 58 p. incl. maps, tables, diagr. 28 p. (incl. fold. map, 5 fold diagr.) 29 cm. U. S. Geological Survey. Professional paper 168 At head of title: United States Department of the Interior. Bibliographical foot-notes. Oil-shales. Paleontology Colorado. Paleontology Utah. Micropaleontology Colorado. Micropaleontology Utah. Green River formation of Colorado and Utah, Origin and microfossils of the oil shale of the. 26917 26917