Trombley, T. J., & Zynjuk, L. D. (1985). Hydrogeology and water quality of the Catoctin Mountain National Park Area, Frederick County, Maryland. U.S. Geological Survey.
Chicago Style (17th ed.) CitationTrombley, Thomas J., and Linda D. Zynjuk. Hydrogeology and Water Quality of the Catoctin Mountain National Park Area, Frederick County, Maryland. Towson, Maryland: U.S. Geological Survey, 1985.
MLA (9th ed.) CitationTrombley, Thomas J., and Linda D. Zynjuk. Hydrogeology and Water Quality of the Catoctin Mountain National Park Area, Frederick County, Maryland. U.S. Geological Survey, 1985.
Warning: These citations may not always be 100% accurate.