1. Federally owned coal and federal lands in the Colorado Plateau Region Publication/Creation: [Reston, Va.] : U.s. Dept. of the Interior, U.S. Geological Survey, [1999] Resource Type: Book Access & Availability: Loading
2. Coalfields of New Mexico : geology and resources Publication/Creation: Washington, D.C. : U.S. Geological Survey, 1992 Resource Type: Book Access & Availability: Loading
3. Cross sections showing coal stratigraphy of the central Powder River Basin, Wyoming and Montana Author/Creator: Geological Survey (U.S.) Publication/Creation: Denver, CO : For sale by Map Distribution Resource Type: Map Access & Availability: Loading
4. Coalfields of New Mexico : geology and resources Publication/Creation: [Reston, Va.] : U.S. Department of the Interior, U.S. Geological Survey, 1991 Resource Type: Book Access & Availability: Loading