Classification and mapping of agricultural land for national water-quality assessment / by Robert J. Gilliom and Gail P. Thelin.

Author/creator Gilliom, Robert J.
Other author Thelin, Gail P.
Other author National Water-Quality Assessment Program (U.S.)
Other author Geological Survey (U.S.)
Format Book
Publication Info[Washington, D.C.?] : U.S. G.P.O. ; Denver, Colo. : Free on application to the U.S. Geological Survey, Information Services, 1997.
Descriptionvi, 70 pages : illustrations, color maps ; 28 cm.
Subjects

SeriesU.S. Geological Survey circular ; 1131
U.S. Geological Survey circular ; 1131. ^A367656
General note"National Water-Quality Assessment Program."
General note"U.S. Department of the Interior, U.S. Geological Survey"--T.p. verso.
General noteShipping list no.: 97-0282-P.
Bibliography noteIncludes bibliographical references (p. 30).
LCCN 96031107
GPO item number0620-A
Govt. docs number I 19.4/2:1131