APA (7th ed.) Citation

Varnes, D. J. (1963). Geology and ore deposits of the South Silverton mining area, San Juan County, Colorado. Gov't Print. Off.

Chicago Style (17th ed.) Citation

Varnes, David J. Geology and Ore Deposits of the South Silverton Mining Area, San Juan County, Colorado. Washington: Gov't Print. Off, 1963.

MLA (9th ed.) Citation

Varnes, David J. Geology and Ore Deposits of the South Silverton Mining Area, San Juan County, Colorado. Gov't Print. Off, 1963.