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Abbreviations

Rev. Proc. 2011-23, 2011-15 I.R.B. 626

Internal Revenue Bulletin 2011-20 · 2026-10-03 edition · updated 2026-10-04 · United States

2011-1

Corrected by

Ann. 2011-7, 2011-5 I.R.B. 446

2011-8

Corrected by

Ann. 2011-8, 2011-5 I.R.B. 446

2011-11

Corrected by

Ann. 2011-9, 2011-7 I.R.B. 499

2011-14

Modified by

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▸Contents — Internal Revenue Bulletin 2011-20
Internal Revenue Bulletin 2011-20

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