Victor Leff and Mary Leff, Husband and Wife v. Commissioner of Internal Revenue, George Sindeband v. Commissioner of Internal Revenue , 235 F.2d 439 ( 1956 )
John K. Teaford v. Commissioner of Internal Revenue , 246 F.2d 73 ( 1957 )
Commissioner v. Duberstein , 80 S. Ct. 1190 ( 1960 )