@book{12390,
	author = {United States.},
	title = {Structure of six farm input industries:},
	publisher = {U.S. Dept. of Agriculture, Economic Research Service},
	year = {[1968]},
	series = {[United States. Dept. of Agriculture. Economic Research Service] ERS},
	address = {[Washington]},
	note = {Cover title.}
}