Summary of selected computer programs produced by the U.S. Geological Survey for simulation of ground-water flow and quality, 1994 /

Autor Appel, Charles A., Reilly, Thomas E.
Vydáno 1994

Regional aquifer-system analysis program of the U.S. Geological Survey, 1978-1992 /

Autor Sun, Ren Jen, Johnston, Richard H.
Vydáno 1994

The quality of our nation's waters : nutrients and pesticides /

Autor Fuhrer, Gregory J., Gilliom, Robert J., Hamilton, Pixie A., 1957-, Morace, Jennifer L., Nowell, Lisa H., Rinella, Joseph F., Stoner, Jeffrey D., Wentz, Dennis A.
Vydáno 1999

Concepts for national assessment of water availability and use : report to congress

Vydáno 2002

Are fertilizers and pesticides in the ground water? : a case study of the Delmarva Peninsula, Delaware, Maryland, and Virginia /

Autor Hamilton, Pixie A., 1957-, Shedlock, R. J.
Vydáno 1992