Nos. 10570, 10617. Argued November 4, 1966. Decided February 6, 1967. J.W. Alexander, Jr., Charlotte, N.C. (Ernest W. Machen, Jr., and Blakeney, Alexander Machen, Charlotte, N.C., on brief), for petitioner Overnite Transp. Co. Hugh J. Beins, Washington, D.C., (Michael F. Grdina, Willoughby, Ohio, on brief), for petitioner Teamsters Local Union No. 171. Gary Green, Atty., N.L.R.B. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Associate Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, and
Nos. 17413, 17476. Argued June 12, 1969. Decided September 10, 1969. Arnold T. Olena, Hodgson, Russ, Andrews, Woods Goodyear, Buffalo, N.Y., for Department Store Food Corp. of Pa. Joseph E. Finley, Metzenbaum, Gaines, Krupansky, Finley Stern, Cleveland, Ohio, for Retail Clerks International Assn., Local 1538, AFL-CIO. Angelo V. Arcadipane, N.L.R.B., Washington, D.C. (Arnold Ordman, Gen. Counsel, Dominick L. Manoli, Assoc. Gen. Counsel, Marcel Mallet-Prevost, Asst. Gen. Counsel, Leonard M. Wagman