APA (7th ed.) Citation

Geological Survey (U.S.). (1975). La Plata County, Colorado. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). La Plata County, Colorado. Reston, Va.: The Survey, 1975.

MLA (9th ed.) Citation

Geological Survey (U.S.). La Plata County, Colorado. The Survey, 1975.

Warning: These citations may not always be 100% accurate.