The field work of this study was started early July, 1939, and continued until the latter part of December. Occupational and medical histories, and physical and roentgenological examinations were made on 2939 men working in Bituminous coal mines,...
Miners -- United States; Mining engineering; Smelting -- Health aspects;
Graphite drawing of globe on paper and mounted on paper board. On the paper board below the drawing is hand written "Drawing of globe in full light and shade. For a more artistic rendering the extreme delicacy of shading would give way to a broader...
The Branch of Resource Evaluation, Intermountain Field Operations Center, U. S. Bureau of Mines USBM, in cooperation with the staff of Central Mineral Resources, U. S. Geological Survey USGS, prepared the following mineral "Briefing Book" summaries...
Wilderness areas -- Utah; Mines and mineral resources -- Utah; Mineral lands -- Utah; Public lands -- Utah;
The John L. Ridgway scrapbook consists of fifty-one scrapbook leaves bound in cloth-covered paper boards (15 1/4 x 11 in.). Contained in the scrapbook are drawings and proof prints by John L. Ridgway. The scrapbook leaves are foliated in pencil...
Scientific illustration; Natural history -- Pictorial works; Birds -- Pictorial works
