TY - RPRT TI - Mineral resources of the Black Canyon and South Piney Creek Wilderness Study Areas, Saguache County, Colorado AU - David A. Lindsey AU - J.R. Hassemer AU - G. A. Abrams AU - R. B. Taylor AU - B.J. Hannigan PY - 1985 DO - 10.3133/b1716a UR - https://pubs.usgs.gov/publication/b1716A ID - b1716A ER -