APA (7th ed.) Citation

Toulmin, P., & Hammarstrom, J. M. (1990). Geology of the Mount Aetna volcanic center, Chaffee and Gunnison counties, Colorado. Dept. of the Interior, U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Toulmin, Priestley, and Jane Marie Hammarstrom. Geology of the Mount Aetna Volcanic Center, Chaffee and Gunnison Counties, Colorado. [Reston, Va.]: Dept. of the Interior, U.S. Geological Survey, 1990.

MLA (9th ed.) Citation

Toulmin, Priestley, and Jane Marie Hammarstrom. Geology of the Mount Aetna Volcanic Center, Chaffee and Gunnison Counties, Colorado. Dept. of the Interior, U.S. Geological Survey, 1990.