Use of stable isotopes of carbon, nitrogen, and sulfur to identify sources of nitrogen in surface waters in the lower Susquehanna River Basin, Pennsylvania /
Cravotta, Charles A.
Pennsylvania.Bureau of Soil and Water Conservation.
Geological Survey (U.S.)
[Reston, Va.] : U.S. Dept. of the Interior, U.S. Geological Survey ; Denver CO : For sale by the USGS Information Services,
1997 [i.e., 2002].
"Prepared in cooperation with the Pennsylvania Department of Environmental Protection, Bureau of Soil and Water Conservation."
Shipping list no.: 2002-0121-P.
Includes bibliographical references (p. 63-68).
Nitrogen
Water
Radioactive tracers in water pollution research
Also available via Internet from the USGS web site. Address as of 9/21/02: http://water.usgs.gov/pubs/wsp/wsp2497; current access is available via PURL.