International Labour Office
20th session, Geneva, 1936 , 23th session, Geneva, 1937 , 24th session, Geneva, 1938 , 25th session, Geneva, 1939 , 27th session, Geneva, 1945 , 29th session, Montreal, 1946 , 30th session, Geneva, 1947 , 31st session, San Francisco, 1948
Available at 5 libraries