Soil survey manual - United States. Bureau of Plant Industry, Soils, and Agricultural Engineering (Washington, D.C. : U.S. Dept. of Agriculture, 2003)
"Revision and enlargement of U.S. Department of Agriculture Miscella neous publication 274, the Soil survey manual, issued September 1937, a nd supersedes it."
Includes index.
Includes bibliographical references (p. 443-457).
Keywords: Soil surveys