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, R. D. 1873-
Published: 1916
Place of publication: Boulder, Colo
Language: eng
Number of pages: 122
Subjects: Tungsten -- Colorado -- Boulder County.; Rocks, Igneous.; Mineralogy -- Colorado.