John, D. A., Armin, R. A., Moore, W. J., & Dohrenwend, J. C. (1981). Geologic map of the Freel and Dardanelles Further Planning Areas, Alpine and El Dorado Counties, California. U.S. Geological Survey.
Chicago Style (17th ed.) CitationJohn, David A., Richard A. Armin, William J. Moore, and John C. Dohrenwend. Geologic Map of the Freel and Dardanelles Further Planning Areas, Alpine and El Dorado Counties, California. Reston, Va.: U.S. Geological Survey, 1981.
MLA (8th ed.) CitationJohn, David A., et al. Geologic Map of the Freel and Dardanelles Further Planning Areas, Alpine and El Dorado Counties, California. U.S. Geological Survey, 1981.
Warning: These citations may not always be 100% accurate.