Nonpoint and point sources of nitrogen in major watersheds of the United States
By: by Larry J. Puckett.
Contributors: Geological Survey (U.S.)
Series: Water-resources investigations report -- 94-4001
Publisher: U.S. Geological Survey; USGS Earth Science Information Center, Open-File Reports Section [distributor]
Published: 1994
Place of publication: Reston, Va; Denver, CO
Language: eng
Subjects: Nonpoint source pollution -- United States.; Water -- Nitrogen content -- United States.; Water -- Pollution -- United States -- Point source identification.
Notes: Includes bibliographical references (p. 9).

Available via Internet from the U.S. Geological Survey/NAWQA web site.