@book{36228,
	author = {National Silicosis Conference},
	title = {National Silicosis Conference;},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1937.},
	series = {U.S. Dept. of Labor. Division of Labor Standards. Bulletin},
	address = {Washington,},
	note = {At head of title: United States Department of Labor. Frances Perkins, secretary. Division of Labor Standards. Verne A. Zimmer, director.}
}