@book{26291,
	author = {Seabourne, R. G. and National Extension College.},
	title = {Introduction to work study and statistics /},
	publisher = {Longman,},
	year = {1971.},
	series = {Longman supervisory series, v. 7},
	address = {Harlow :},
	note = {"A National Extension College course prepared in collaboration with the Institute of Supervisory Management."}
}