General Petroleum Corporation of California. In matter of General Petroleum Corp. of California and Sailors Union of the Pacific; in matter of General Petroleum Corp. of Calif., and Pacific Coast Marine Firemen, Oilers, Watertenders, & Wipers Assn.; in matter of General Petroleum Corp. of Calif. and Marine Cooks and Stewards Assn. of Pacific Coast; in matter of General Petroleum Corp. of Calif., and Pacific Coast Marine Firemen, Oilers, Watertenders, & Wipers Association; in matter of General Petroleum Corporation of California and American Radio Telegraphists' Association, cases nos. R-479, R-500, R-506, R-513, and R-516; supplemental decision, certification of representatives, and order, July 29, 1938.