APA (7th ed.) Citation

Wood, G. H. (1972). Geologic map of anthracite-bearing rocks in the north part of the Orwigsburg quadrangle, Schuylkill County, Pennsylvania. U.S. Geological Survey.

Chicago Style (17th ed.) Citation

Wood, Gordon H. Geologic Map of Anthracite-bearing Rocks in the North Part of the Orwigsburg Quadrangle, Schuylkill County, Pennsylvania. Washington, D.C.: U.S. Geological Survey, 1972.

MLA (9th ed.) Citation

Wood, Gordon H. Geologic Map of Anthracite-bearing Rocks in the North Part of the Orwigsburg Quadrangle, Schuylkill County, Pennsylvania. U.S. Geological Survey, 1972.