@book{10068,
	author = {Larson, Nellie G.},
	title = {The sampling method in social and economic research;},
	year = {1941.},
	series = {U.S. Bureau of agricultural economics. [Library]  Agriculture economics bibliography},
	address = {Washington,},
	note = {At head of title: United States Department of agriculture.  Bureau of agricultural economics.}
}