http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Bureau of Plant Industry, Soils, and Agricultural Engineering.
vii, 503 pages 16 unnumbered pages of plates : illustrations, charts, maps ; 24 cm.
by Soil Survey Staff, Bureau of Plant Industry, Soils and Agricultural Engineering.
"Revision and enlargement of U.S. Department of Agriculture Miscellaneous publication 274, the Soil survey manual, issued September 1937, and supersedes it."
Agriculture handbook (United States. Department of Agriculture) ; no. 18