TY - RPRT TI - Mineral resources of study areas contiguous to the Uncompahgre Primitive Area, San Juan Mountains, southwestern Colorado, with a section on interpretation of aeromagnetic data AU - Thomas August Steven AU - P. W. Lipman AU - F. S. Fisher AU - C. L. Bieniewski AU - H. C. Meeves AU - Peter Popenoe AU - R. G. Luedke PY - 1977 DO - 10.3133/b1391e UR - https://pubs.usgs.gov/publication/b1391E ID - b1391E ER -