Nos. 17300, 17463. Argued May 1, 1963. Decided June 13, 1963. Mr. Michael H. Gottesman, Washington, D.C., with whom Messrs. David E. Feller, Elliot Bredhoff and Jerry D. Anker, Washington, D.C., were on the brief, for petitioner in No. 17300 and intervenor in No. 17463. Mr. Theo. F. Weiss, San Antonio, Tex., with whom Mr. William B. Devaney, Washington, D.C., was on the brief, for petitioner in No. 17463 and intervenor in No. 17300. Mr. Solomon I. Hirsh, Attorney, N.L.R.B., of the bar of the Supreme