No. 71-2520. October 24, 1972. Harold H. Brown (argued), George C. Lyon, of Haight, Lyon Smith, Los Angeles, Cal., John B. Wisely, Jr., Yuma, Ariz., Victor J. Van Bourg, of Levy, Deroy, Geffner Van Bourg, San Francisco, Cal., for petitioners. Joseph E. Mayer, Atty. (argued), Stephen J. Solomon, Atty., Marcel Mallet-Prevost, Asst. Gen. Counsel, Peter G. Nash, Gen. Counsel, NLRB, Washington, D.C., for respondent. Petition for review from the National Labor Relations Board. Before BARNES and WALLACE