Cite
MLA (8th Edition)
Potentiometric Surface of the Principal Aquifer and Hydrologic Conditions In the Ponce-Juana Diaz Area, Puerto Rico, April-May, 1987. U.S. Department of the Interior, U.S. Geological Survey, 1990.
APA (7th Edition)
Potentiometric surface of the principal aquifer and hydrologic conditions in the Ponce-Juana Diaz area, Puerto Rico, April-May, 1987. (1990). U.S. Department of the Interior, U.S. Geological Survey.
Chicago (17th Edition)
“Potentiometric Surface of the Principal Aquifer and Hydrologic Conditions in the Ponce-Juana Diaz Area, Puerto Rico, April-May, 1987.” San Juan, Puerto Rico: U.S. Department of the Interior, U.S. Geological Survey, 1990.