00899cam a22002291 4500 agr39000262 DLC 20260227110957.0 800116s1938 xxua f000 0 eng agr39000262 (OCoLC)5877966 DLC NSySU-F OCoLC DLC premarc QC921 .U6 1938 U. S. Weather Bureau. Codes for cloud forms and states of the sky according to the international system of classification. Prepared by the Weather bureau Committee on clouds and cloud forms: Ivan R. Tannehill, chairman, Horace R. Byers, Edgar B. Calvert [and others] Washington, U.S. Govt. print off., 1938. iv, 100 p. illus., diagr. 23 cm. Its Circular S. At head of title: W.B. no. 1249. U.S. Department of agriculture. Weather bureau. Clouds. 9937 9937