APA (7th ed.) Citation

Evarts, R. C. (2004). Geologic map of the Saint Helens quadrangle, Columbia County, Oregon, and Clark and Cowlitz counties, Washington. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Evarts, Russell C. Geologic Map of the Saint Helens Quadrangle, Columbia County, Oregon, and Clark and Cowlitz Counties, Washington. [Reston, Va.]: U.S. Geological Survey, 2004.

MLA (9th ed.) Citation

Evarts, Russell C. Geologic Map of the Saint Helens Quadrangle, Columbia County, Oregon, and Clark and Cowlitz Counties, Washington. U.S. Geological Survey, 2004.