1. Distribution of beryllium, tin, and tungsten in the Lake George area, Colorado Author/Creator: Hawley, C. C. 1929- (Charles Caldwell), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1968 Format: Book Access & Availability: Loading
2. Distribution of beryllium, tin, and tungsten in the Lake George area, Colorado Author/Creator: Hawley, C. C. 1929- (Charles Caldwell) Publication/Creation: Washington : [publisher not identified], 1968 Format: Book Access & Availability: Loading