Wilshire, H. G. (1963). Geology of the Crutchfield quadrangle in Kentucky. U.S. Geological Survey.
Chicago Style (17th ed.) CitationWilshire, Howard Gordon. Geology of the Crutchfield Quadrangle in Kentucky. Washington, D.C.: U.S. Geological Survey, 1963.
MLA (9th ed.) CitationWilshire, Howard Gordon. Geology of the Crutchfield Quadrangle in Kentucky. U.S. Geological Survey, 1963.
Warning: These citations may not always be 100% accurate.