No. 137, Docket 26252. Argued January 5, 1961. Decided May 3, 1961. Jerry D. Anker, Arthur J. Goldberg, Washington, D.C. (David E. Feller, Washington, D.C., Samuel L. Rothbard, Abraham L. Friedman, Rothbard, Harris Oxfeld, Newark, N.J., on the brief), for petitioners. Melvin J. Welles, Washington, D.C. (Stuart Rothman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Judith Bleich Kahn, N.L.R.B., Washington, D.C., on the brief), for respondent.