http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Evaluation of agricultural best-management practices in the Conestoga River Headwaters, Pennsylvania
Evaluation of agricultural best management practices in the Conestoga River Headwaters, Pennsylvania
vi, 69 pages : illustrations, maps ; 28 cm.
"U.S. Department of the Interior, U.S. Geological Survey"--Title page verso.
U.S. Geological Survey water-supply paper ; 2493