Annual report. Colorado Bureau of Mines
State of Colorado, Bureau of Mines., Began with 1919., Last issue published 1949., Title varies slightly., Reports for 1942/1943 issued together., Reports for 1925, 1936, 1938, 1940, 1944-1945, and 1948 not published., Print version record.
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- Annual report for the year 1947
- State of Colorado, Bureau of Mines., Began with 1919., Last issue published 1949., Title varies slightly., Reports for 1942/1943 issued together., Reports for 1925, 1936, 1938, 1940, 1944-1945, and 1948 not published., Print version record.