Some of the following links and information were graciously provided by Attorney Larry Becraft at http://home.hiwaay.net/~becraft/TaxActs.html for the education and edification of scholars of the income tax laws.  You can order a CD containing the acts from 1913 through 1940 for $50 by clicking here. 

1. A good overall index of the subjects of taxation, citizenship, money, and the federal reserve may be found in the below link:
   http://famguardian.org/PublishedAuthors/Govt/HistoricalActs/IndextoFedStats1874-1931.pdf
2. Below is an excellent cross-reference for all versions of the Internal Revenue Code and the source from which they derived in the Statutes At Large
   Derivations of Code Sections of the Internal Revenue Codes of 1939 and 1954, SEDM Litigation Tool #09.011 (OFFSITE LINK)
3. If you would like to access all historical volumes of the Statutes at Large, see the following resources:
   3.1  U.S. Statutes at Large (PDF)-SEDM. Requires Member Subscription account to access. ALL statutes included
   3.2  What is Taxed (1917 to the present)
   3.3  A Century of Lawmaking for a New Nation: U.S. Congressional Documents and Debates (1774-1875)
   3.4. United States Statutes at Large (1789-1951)-Library of Congress
   3.5  Potomac Publishing (all years.  Paid subscription required)