B-30 Geology and Ore Deposits of the Red Cliff District B-30 Geology and Ore Deposits of the Red Cliff District, Colorado
B-28 Oil and Water Possibilities of Parts of Delta and Mesa Counties B-28 Oil and Water Possibilities of Parts of Delta and Mesa Counties, Colorado
B-27 Part 1: Underground Water Possibilities for Stock and Domestic Purposes in the La Junta Area B-27 Part 1: Underground Water Possibilities for Stock and Domestic Purposes in the La Junta Area, Colorado. Part 2: Underground Water Resources of Parts of Crowley and Otero Counties. Part 3: Geology of Parts of Las Animas, Otero and Bent Counties
B-26 Preliminary Report on the Underground Waters of a Part of Southeastern Colorado B-26 Preliminary Report on the Underground Waters of a Part of Southeastern Colorado
B-20 Preliminary Notes on the Revision of the Geological Map of Eastern Colorado B-20 Preliminary Notes on the Revision of the Geological Map of Eastern Colorado