Mineral Resources of the Region around Boulder Dam 52 Figures and 14 Plates and 3 Sheets in Back Pocket.
Washington, D. C. United States Geological Survey, 1936. First Edition. Bulletin 6. Unmarked internally; some writing on front cover. Spine is reinforced with black tape and title is written on apine. Covers are tattered and corners are ripped or missing on front cover. And backcover. Edges of covers are worn..... More