Johnston v. Helvering , 141 F.2d 208 ( 1944 )
Cammack v. Slattery Bro., Inc. , 241 N.Y. 39 ( 1925 )
Helvering v. Stuart , 63 S. Ct. 140 ( 1942 )
Helvering v. Hallock , 60 S. Ct. 444 ( 1940 )