@book{10180,
	author = {Mortlock, Harry Crawford, and Greenawalt, Ross Dilworth,},
	title = {Erosion and related land use conditions on the Box elder creek project, Nebraska,},
	publisher = {U.S. Govt. print. off.,},
	year = {1941]},
	series = {U. S. Soil conservation service. Erosion survey},
	address = {[Washington,},
	note = {7 fold. maps in pocket.}
}