The main tungsten area of Boulder County, Colorado
By: by R.D. George, with notes on the intrusive rocks, by R.D. Crawford.
Contributors: Crawford, Ralph Dixon, 1873-
Publisher: [Colorado Geological Survey]
Published: 1916
Place of publication: Boulder, Colorado
Language: eng
Number of pages: 122
Subjects: Tungsten ores -- Colorado -- Boulder county.; Rocks, Igneous.
Notes: Reprinted with additions from the first report of the Colorado Geological survey.

Fold. map in pocket.

Errata slip inserted.

Bibliography: p. 106-115.