Obermeier, S. F., & Geological Survey (U.S.). (1984). Engineering geology and design of slopes for cretaceous Potomac deposits in Fairfax County, Virginia, and vicinity. U.S. G.P.O. ; For sale by the Distribution Branch, Text Products Section, U.S. Geological Survey.
Chicago Style (17th ed.) CitationObermeier, Stephen F., and Geological Survey (U.S.). Engineering Geology and Design of Slopes for Cretaceous Potomac Deposits in Fairfax County, Virginia, and Vicinity. Washington : Alexandria, VA: U.S. G.P.O. ; For sale by the Distribution Branch, Text Products Section, U.S. Geological Survey, 1984.
MLA (8th ed.) CitationObermeier, Stephen F., and Geological Survey (U.S.). Engineering Geology and Design of Slopes for Cretaceous Potomac Deposits in Fairfax County, Virginia, and Vicinity. U.S. G.P.O. ; For sale by the Distribution Branch, Text Products Section, U.S. Geological Survey, 1984.