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Fraternal Order of Police, Illinois State Troopers, Lodge No. 41, Petitioner v. Commissioner of Internal Revenue , 833 F.2d 717 ( 1987 )
Sierra Club Inc. v. Commissioner Internal Revenue Service , 86 F.3d 1526 ( 1996 )
oregon-state-university-alumni-association-inc-v-commissioner-of , 193 F.3d 1098 ( 1999 )