Water quality in the Delmarva Peninsula, Delaware, Maryland, and Virginia, 1999-2001 /
Denver, J. M.
Geological Survey (U.S.)
Reston, Va. : U.S. Department of the Interior, U.S. Geological Survey ; Denver, CO : For sale by U.S. Geological Survey, Information Services,
2004.
Includes bibliographical references.
Water quality
Agricultural chemicals