No. 72-1275. January 31, 1973. John Cosmic, John W. Broadfoot, Amarillo, Tex., for plaintiffs-appellants. Tom Upchurch, Jr., Amarillo, Tex., Buddy Wright, Fort Worth, Tex., for defendants-appellees. Appeal from the United States District Court for the Northern District of Texas. Before RIVES, THORNBERRY and GOLDBERG, Circuit Judges. GOLDBERG, Circuit Judge: This appeal involves the legality of common situs picketing conducted by the defendant-union on numerous construction sites in the Amarillo,