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Gillion, Robert J.

Classification and mapping of agricultural land for national water-quality assessment / by Robert J. Gilliom and Gail P. Thelin. - United Stated: U. S. Department of the Interior, U. S. Geological Survey [1997]. - vi, 70 p. : tables, maps ; 28 cm. - 1131 .

Includes bibliographical references (p. 30).

ISBN: 0607868090

Subjects--Topical Terms:
Agricultural mapping--United States
Land use, Rular--United States
Water quality--United States

Dewey Class. No.: 333.760973