TY - RPRT TI - Geochemical and geostatistical evaluation of American Flats-Silverton planning units, San Juan volcanic province, Colorado AU - Erick F. Weiland AU - J. W. Lindemann AU - R. A. Connors AU - W. T. Meyers AU - S. A. Johnson AU - W. D. Heran PY - 1981 DO - 10.3133/ofr81599 UR - https://pubs.usgs.gov/publication/ofr81599 ID - ofr81599 ER -