2017-07-182022-02-032017-07-182022-02-031900-1999https://hdl.handle.net/11124/171070Manuscript; blackline; on sheet: 46 x 61 cm.Covers parts of Boulder County, Colorado. Covers parts of the Tungsten quadrangle, Colorado.46 x 61 cmmanuscript mapsmine mapsengMining claims -- Colorado -- Boulder County -- MapsMines and mineral resources -- Colorado -- Boulder County -- MapsStillImage