Shorter Contributions to General Geology 1920.
Washington: Government Printing Office, 1921. 4to. 146 pp. Spine ends have minor wear w/ tiny nicks. Front cover lightly browned around edges, w/ stamp of museum in upper right corner. Bottom front corner lightly bumped w/ fold in cover. This US Geological Survey publication contains six reports on various geological discoveries. Includes plates and illustrations. Very Good Paperback (Item ID: 45607)