Mineral resources of the Chama-southern San Juan Mountains wilderness study area, Mineral, Rio Grande, Archuleta, and Conejos Counties, Colorado / by U.S. Geological Survey and U.S. Bureau of Mines.
Publication Info.
[Reston, Va.] : United States Department of the Interior, Geological Survey, 1985.
Washington : United States Government Printing Office
Also available online in PDF format from the U.S. Geological Survey Warehouse (http://pubs.er.usgs.gov/).
"This article supersedes: Mineral resources of the Chama-southern San Juan Mountains Wilderness Study Area, Mineral, Rio Grande, Archuleta, and Conejos counties, Colorado (1977).