TY - RPRT TI - Geophysical studies of the Cripple Creek mining district, Colorado AU - M. Dean Kleinkopf AU - Donald L. Peterson AU - Garland B. Gott PY - 1970 DO - 10.1190/1.1440110 UR - https://pubs.usgs.gov/publication/70226541 ID - 70226541 ER -