Nos. 77-1165, 77-1630. Argued June 8, 1978. Decided April 25, 1979. Rehearing Denied May 31, 1979. David A. Rosenfeld, San Francisco, Cal., for petitioner in No. 77-1165 and intervenor in No. 77-1630. Robert V. Magor, San Francisco, Cal., for petitioner in No. 77-1630 and intervenor in No. 77-1165. Allison W. Brown, Jr., Deputy Asst. Gen. Counsel, N.L.R.B., Washington, D.C., with whom John S. Irving, Gen. Counsel, Carl L. Taylor, Associate Gen. Counsel, and Elliott Moore, Deputy Associate Gen. Counsel