For more information, go also to Historical Tax Laws page in this guide.
- Archives, RIA
1986-. Under the "Table of Contents" tab, navigate: Checkpoint Archives. RIA's "Archives" offers the Internal Revenue Code at various points in time, as well as Explanations and Annotations.
- Federal Research Library Archives, Tax Analysts
Click on "Research Tools"→Federal Research Library→Archives
- Federal Tax Archvies, CCH
1979- (and 1939, 1954 Internal Revenue Codes, 1913 Income Tax Law). Also offers "archived editions of the U.S. Master Tax Guide, Standard Federal Tax Reporter, CCH TaxDay, and IRS publications." (CCH)
- Internal Revenue Code Archive, Bloomberg BNA
- Internal Revenue Code (Archive), Bloomberg Law