APA (7th ed.) Citation

(1981). Geologic map of the Mount Richthofen quadrangle and the western part of the Fall River pass quadrangle, Grand and Jackson counties, Colorado. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Geologic Map of the Mount Richthofen Quadrangle and the Western Part of the Fall River Pass Quadrangle, Grand and Jackson Counties, Colorado. Reston, VA: U.S. Geological Survey, 1981.

MLA (9th ed.) Citation

Geologic Map of the Mount Richthofen Quadrangle and the Western Part of the Fall River Pass Quadrangle, Grand and Jackson Counties, Colorado. U.S. Geological Survey, 1981.