Classification and mapping of agricultural land for national water-quality assessment.

Bibliographic Details
Main Author:	Gilliom, Robert J.
Corporate Authors:	National Water-Quality Assessment Program (U.S.), Geological Survey (U.S.)
Other Authors:	Thelin, Gail P.
Format:	Government Document Book
Language:	English
Published:	[Washington, D.C.?] : Denver, Colo. : U.S. G.P.O. ; Free on application to the U.S. Geological Survey, Information Services, 1997.
Series:	U.S. Geological Survey circular ; 1131.
Subjects:	Agricultural mapping > United States. Land use, Rural > United States. Water quality > United States.

Description
Item Description:	"National Water-Quality Assessment Program." "U.S. Department of the Interior, U.S. Geological Survey"--Title page verso. Shipping list number: 97-0282-P.
Physical Description:	vi, 70 pages : illustrations, color maps ; 28 cm.
Bibliography:	Includes bibliographical references (page 30).