Geological Survey (U.S.), Klasner, J. S., & Day, G. W. (1985). Geochemical survey of the Burden Falls Roadless Area, Pope County, Illinois. The Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.), J. S. Klasner, and Gordon W. Day. Geochemical Survey of the Burden Falls Roadless Area, Pope County, Illinois. Reston, Va.: The Survey, 1985.
MLA (8th ed.) CitationGeological Survey (U.S.), et al. Geochemical Survey of the Burden Falls Roadless Area, Pope County, Illinois. The Survey, 1985.
Warning: These citations may not always be 100% accurate.