No. 18354. March 4, 1970. Shawe Rosenthal, Earle K. Shawe, Robert S. Hillman, Baltimore, Md., on brief of petitioners. Arnold Ordman, Associate Gen. Counsel, Dominick L. Manoli, Marcel Mallet-Prevost, Assts. Gen. Counsel, Leonard M. Wagman, Atty., N.L.R.B., Washington, D.C., on brief for respondent. Plone, Tomar, Parks Seliger, by Howard S. Simonoff, Camden, N.J., of counsel, S.G. Lippman, Gen. Counsel Retail Clerks International Assn., AFL-CIO, on brief for intervenor. Before WEICK, Chief Judge