TY - RPRT TI - Rapid evaluation of heavy minerals in stream sediments of the Prairie Divide area of northern Colorado: A tool for Kimberlite exploration AU - V. L. Leighton AU - M. E. McCallum PY - 1979 DO - 10.3133/ofr79761 UR - https://pubs.usgs.gov/publication/ofr79761 ID - ofr79761 ER -