Nitrogen in the Mississippi basin
Subtitle: estimating sources and predicting flux to the Gulf of Mexico
Contributors: Geological Survey (U.S.)
Series: USGS fact sheet -- FS-135-00; Fact sheet (Geological Survey (U.S.)) -- FS-00-135
Publisher: U.S. Dept. of the Interior, U.S. Geological Survey
Published: 2000
Place of publication: [Reston, Va.?
Language: eng
Subjects: Water -- Nitrogen content -- Mississippi River Watershed; Water -- Pollution -- Mississippi River Watershed
Notes: Caption title

Shipping list no.: 2001-0129-P

"December 2000"--P. [1]

Includes bibliographical references (p. [6])