TY - RPRT TI - Geochemical map of the Piedra Wilderness study area, Archuleta and Hinsdale counties, Colorado AU - K. J. Franczyk AU - S. M. Condon AU - A.L. Bush PY - 1985 DO - 10.3133/mf1630c UR - https://pubs.usgs.gov/publication/mf1630C ID - mf1630C ER -