United Steelworkers v. Warrior & Gulf Navigation Co. , 80 S. Ct. 1347 ( 1960 )
Allied Chemical & Alkali Workers of America, Local Union No. 1 v. Pittsburgh Plate Glass Co. , 92 S. Ct. 383 ( 1971 )
At&T Technologies, Inc. v. Communications Workers , 106 S. Ct. 1415 ( 1986 )