Geology of the Rangely oil district, Rio Blanca County, Colorado : with a section on the water supply /

by Gale, Hoyt S. 1876-1952
Published 1908

Coal fields of northwestern Colorado and northeastern Utah /

by Gale, Hoyt S. 1876-1952
Published 1910

Nitrate deposits /

by Gale, Hoyt S. 1876-1952
Published 1912