@book{36797,
	author = {International Labour Office},
	title = {Safety in coal mines.},
	year = {1953-55.},
	series = {Its Studies and reports, new ser.,},
	address = {Geneva,},
	edition = {[Rev. and enl. ed.]},
	note = {Previous ed. issued in 1939 under title: Safety provisions for underground work in coal mines.}
}