76 S.Ct. 349 MASTRO PLASTICS CORP. ET AL. v. NATIONAL LABOR RELATIONS BOARD. CERTIORARI TO THE UNITED STATES COURT OF APPEALS FOR THE SECOND CIRCUIT. No. 19. Argued October 17, 1955. Decided February 27, 1956. 1. In the collective-bargaining contract here involved, the union’s undertaking “to refrain from engaging in any strike or work stoppage […]
