@book{61618,
	author = {Cain, Glen George. and National Commission on Employment and Unemployment Statistics U.S.},
	title = {Labor force concepts and definitions in view of their purposes},
	publisher = {National Commission on Employment and Unemployment Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off.},
	year = {1978.},
	series = {Background paper - National Commission on Employment and Unemployment Statistics ; no. 13},
	address = {Washington},
	note = {March 1978.}
}