Espenshade, G. H. (1954). Geology and mineral deposits of the James River-Roanoke River manganese district, Virginia. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationEspenshade, Gilbert H. Geology and Mineral Deposits of the James River-Roanoke River Manganese District, Virginia. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1954.
MLA (9th ed.) CitationEspenshade, Gilbert H. Geology and Mineral Deposits of the James River-Roanoke River Manganese District, Virginia. United States Department of the Interior, Geological Survey, 1954.
Warning: These citations may not always be 100% accurate.