Report to the President by Emergency Board, appointed Mar. 28, 1947, pursuant to sec. 10 of railway labor act, to investigate and report upon certain disputes between Ann Arbor Railroad Company, Grand Trunk Western Railroad Company, Pere Marquette Railway Company, Wabash Railway Company and certain of their employees represented by National Maritime Union (CIO), (NMB cases A-2455, 6, 7 and 8), Detroit, Mich., Apr. 21, 1947.