NATIONAL LABOR RELATIONS BOARD, PETITIONER, v. PLUMBERS AND STEAMFITTERS LOCAL UNION NO. 100, ET AL., RESPONDENTS. No. 73-3145. Summary Calendar.[*] United States Court of Appeals, Fifth Circuit. April 1, 1974. [*] Rule 18. 5th Cir.; see Isbell Enterprises, Inc. v. Citizens Casualty Co. of New York et al., 5th Cir. 1970, 431 F.2d 409, Part […]