@book{36435,
	author = {Williams, Constance Willard.},
	title = {Pay differentials for night work under union agreements.},
	publisher = {G.P.O.,},
	year = {1943.},
	series = {U.S. Bureau of labor statistics ;},
	address = {Washington :},
	note = {"Prepared by Constance Williams."--Letter of transmittal.}
}