@book{36018,
	author = {International Labour Office. and International labor conference},
	title = {The minimum requirement of professional capacity in the case of captains, navigating and engineer officers in charge of watches on board merchant ships.},
	publisher = {International labour office,},
	year = {1929.},
	address = {Geneva,},
	note = {At head of title: Questionnaire IV. International labour conference. Fifteenth session.}
}