Fluorspar deposits of Colorado - Aurand, Harry A. (Denver, Col., Eames brothers, state printers, 1920)
At head of title: Colorado Geological survey, Boulder...
"Bibliography of Colorado fluorspar": p. 87-88.
"Bibliography of fluorspar in the United States": p. 89-91.
Bibliographical footnotes.
Keywords: Mines and mineral resources -- Colorado; Fluorspar