No. 71-1599. Argued April 10, 1972. Decided June 21, 1972. Abraham L. Friedman, Rothbard, Harris Oxfeld, Newark, N.J., for petitioner; Emil Oxfeld, Newark, N. J., David Clayman, Columbus, Ohio, of counsel. Eugene Granof, N.L.R.B., Washington, D.C., for petitioner. Arnold F. Bunge, Marshall, Melhorn, Bloch Belt, Toledo, Ohio, for intervenor. Peter G. Nash, General Counsel, Marcel Mallet-Prevost, Assistant General Counsel, Janet Skaare Morris, Atty. for N.L.R.B. Petition for review from the National