Cite
MLA (8th Edition)
Preliminary Map Showing the Difference Between the Potentiometric Surfaces of the Aquia Aquifer of September 1982 and September 1984 In Southern Maryland. United States Department of the Interior, Geological Survey, 1985.
APA (7th Edition)
Preliminary map showing the difference between the potentiometric surfaces of the Aquia aquifer of September 1982 and September 1984 in southern Maryland. (1985). United States Department of the Interior, Geological Survey.
Chicago (17th Edition)
“Preliminary Map Showing the Difference between the Potentiometric Surfaces of the Aquia Aquifer of September 1982 and September 1984 in Southern Maryland.” Towson, Maryland: United States Department of the Interior, Geological Survey, 1985.