00927cam a22002411 4500 l 31000068 DLC 20260227111533.0 790710s1929 sz i100 0 eng c l 31000068 (OCoLC)5156301 Library, U.S. Dept. of Labor OCl DLC premarc VK221 .I55 1929a International Labour Office. The minimum requirement of professional capacity in the case of captains, navigating and engineer officers in charge of watches on board merchant ships. Fourth item, IV on the agenda. Geneva, International labour office, 1929. 24 p. 21 cm. At head of title: Questionnaire IV. International labour conference. Fifteenth session. Ships Manning. Maritime law. International labor conference (15th : 1930 : Geneva) 36018 36018