@book{12013,
	author = {Wischmeier, Walter H., and Smith, Dwight David,},
	title = {Predicting rainfall-erosion losses from cropland east of the Rocky Mountains :},
	publisher = {Agricultural Research Service, U.S. Dept of Agriculture in cooperation with Purdue Agricultural Experiment Station,},
	year = {1965.},
	series = {Agriculture handbook / United States Department of Agriculture ;},
	address = {Washington, D.C. :}
}