Soil survey manual / Soil Survey Staff, Bureau of Plant Industry, Soils and Agricultural Engineering. United States Dept. of Agriculture. United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Soil Survey 631.47 UNS "Revision and enlargement of U.S. Department of Agriculture Miscellaneous publication 274, the Soil survey manual, issued September 1937, and supersedes it." Includes bibliographical references and index. Washington, D.C. : Agricultural Research Administration, U.S. Dept. of Agriculture, 1951. 1951. 1951 Text (vii), 503 p. [16] pages of plates : eng Agriculture handbook / United States Department of Agriculture ; no. 18 Agriculture handbook (United States. Department of Agriculture) ; no. 18.