TY - RPRT TI - Oligocene volcanic rocks: Possible source of uranium in epigenetic deposits in parts of Chaffee, Park, and Fremont Counties, Colorado AU - K. A. Dickinson AU - F. A. Hills PY - 1982 DO - 10.3133/ofr82403 UR - https://pubs.usgs.gov/publication/ofr82403 ID - ofr82403 ER -