http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Economies of size in U.S. field crop farming
Economies of Size in US Field Crop Farming
iii, 38 pages : illustrations, 1 map ; 28 cm.
by Thomas A. Miller, Gordon E. Rodewald, and Robert G. McElroy.