JONES 1920 USGS BULL 710-A P 1-36FORRESTER AND NELSON 1945 USGS OP-FILE REP: PB-ZN DEP PINE CFRYKLUND (WITH A SECTION BY WEIS) 1964 USGS PROF PAPER 445FORRESTER 1945 USGS OP-FILE MAP: MAPS OF THE DENVER MINESHANNON 1926 US NATL MUSEUM BULL 131 P 99-100UMPLEBY AND JONES 1923 USGS BULL 732 P 90, 103-109