Economic Geology of the Idaho Springs District, Clear Creek and Gilpin Counties, Colorado: Issues 1204-1209
Donald Bruce Tatlock · James Bachelder Cathcart · Jerry Chipman Olson · Louis Pavlides · Mortimer Hay Staatz · Robert Hadley Moench · Avery Ala Drake · Howard Franklin Albee · William Courtney Overstreet
Jan 1965 · U.S. Government Printing Office