No. 69, Docket 72-1298. Argued October 17, 1972. Decided December 21, 1972. Joseph C. Thackery, Atty., NLRB, Washington, D.C. (Peter G. Nash, Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and Robert A. Giannasi, Atty., NLRB, Washington, D.C., on brief), for petitioner. Eugene D. Ulterino, Rochester, N.Y. (Nixon, Hargrave, Devans Doyle, Rochester, N.Y., on brief), for intervenor. Richard Lipsitz, Buffalo, N.Y. (Lawrence A. Schulz and Lipsitz, Green, Fahringer, Roll, Schuller James, Buffalo