http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Income and structure of American agriculture under future alternatives of farm size, policies, and exports
a cooperative study with the Office of Planning and Evaluation, U.S. Dept. of Agriculture
Income and structure of American agriculture
"Auxiliary study of RANN project GI-32990."