@book{12508,
	author = {Vermeer, James, and Slaughter, Rudie W.,},
	title = {Analysis of a general cropland retirement program},
	publisher = {Economic Research Service, U.S. Dept. of Agriculture},
	year = {[1968]},
	series = {[United States. Dept. of Agriculture. Economic Research Service] ERS},
	address = {Washington]}
}