National Labor Relations Board v. Pennsylvania Greyhound Lines, Inc. , 58 S. Ct. 571 ( 1938 )
National Labor Relations Board v. Sands Manufacturing Co. , 59 S. Ct. 508 ( 1939 )
International Association of MacHinists Tool and Die Makers Lodge No. 35 v. National Labor Relations Board , 61 S. Ct. 83 ( 1940 )