@book{11739,
	author = {Haren, Claude Clarence,},
	title = {Conservation farming in selected areas of the southern Piedmont.},
	publisher = {Agricultural Research Service, U.S. Dept. of Agriculture,},
	year = {1960.},
	series = {United States. Agricultural Research Service ;},
	address = {Washington :},
	note = {Cover title.}
}