@book{36980,
	author = {Griffin, William Gatewood. and Homan, Sheldon William. and United States.},
	title = {The principles and techniques of mechanical guarding /},
	publisher = {U.S. Dept. of Labor, Bureau of Labor Standards,},
	year = {1959.},
	address = {Washington] :},
	note = {"Replaces Special bulletin no. 7, Suggested standards for industrial safeguards," issued in 1942 by the Bureau under its earleir name, Division of Labor Standards.}
}