@book{26470,
	author = {Whitson, A. R. and Geib, W. J. and United States.},
	title = {Soil survey of Walworth County, Wisconsin.},
	publisher = {Published by the state,},
	year = {1924.},
	series = {Wisconsin Geological and natural history survey. Bulletin 56-C. Soil ser.},
	address = {Madison, Wis.,},
	note = {At head of title: Soil survey in cooperation with the College of agriculture.}
}