TY - RPRT TI - Mineral resources of the Papa Keal and Zapata Creek Wilderness Study Areas, Alamosa County, Colorado AU - Bruce R. Johnson AU - Jerry R. Hassemer AU - Brian J. Hannigan PY - 1986 DO - 10.3133/b1716d UR - https://pubs.usgs.gov/publication/b1716D ID - b1716D ER -