1. X-ray mineralogy of the Parachute Creek Member, Green River Formation, in the Northern Piceance Creek Basin, Colorado Author/Creator: Brobst, Donald A. 1925-2011, (Donald Albert), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1973 Format: Book Access & Availability: Loading
2. Summary of United States mineral resources Author/Creator: Brobst, Donald A. 1925-2011, (Donald Albert), author Publication/Creation: Washington : United States Department of the Interior, Geological Survey, 1973 Format: Book Access & Availability: Loading