MIN-1936-01 Annotated Catalogue of Unpublished Engineering and Geological Reports on Mineral Resources of Colorado

B-30 Geology and Ore Deposits of the Red Cliff District, Colorado

B-31 Geology of the Tarryall District, Park County, Colorado

B-25 Oil Shales of Colorado

B-16 Radium, Uranium, and Vanadium Deposits of Southwestern Colorado

B-22 Mineral Deposits of the Western Slope

B-18 Fluorspar Deposits of Colorado

B-23 Some Anticlines of Routt County, Colorado

B-21 The Geology of the Ward Region, Boulder County, Colorado

B-17 Twin Lakes District of Colorado

B-15 Manganese Deposits of Colorado

GEO-1918-01 The Denver and Salt Lake Railroad