Pinellas Ice & Cold Storage Co. v. Commissioner , 53 S. Ct. 257 ( 1933 )
Helvering v. Minnesota Tea Co. , 56 S. Ct. 269 ( 1935 )
G. & K. Manufacturing Co. v. Helvering , 56 S. Ct. 276 ( 1935 )
Gregory v. Helvering , 55 S. Ct. 266 ( 1935 )