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Sources
- Gumbel, Andrew. "Steal this vote: The history of dirty elections and democracy." Nation Books. 2005.
http://books.google.com/books?id=Ap2Fe
NIXqbEC&pg=PA154&lpg=PA154&dq=%
22william+mcswiggan%22+1926&source=web
&ots=Fv702iBV83&sig=0UiGaSnK4CzLTJqEz
SXisHRy3uc&hl=en - Helvering, Guy T. "A narrative of the period briefly descriptive of the period 1919 to 1936." U.S Treasury Department.
http://www.irs.gov/pub/irs-utl/
file-5-intelligence-unit-narrative-of-period-1919-1936-by-guy-helvering.pdf - "Al Capone." National Archives. May 22, 1997. http://www.archives.gov/exhibits/american_originals/capone.html
- "Famous cases: Alphonse Capone, aka. Al, Scarface." Federal Bureau of Investigation.
http://www.fbi.gov/libref/historic/famcases/capone/capone.htm - "In re Alphonse Capone." U.S. Internal Revenue Service. July 8, 1931. http://www.irs.gov/pub/irs-utl/file-1-letter-dated-07081931
-in-re-alphonse-capone.pdf - "Inflation calculator." Bureau of Labor Statistics.
http://data.bls.gov/cgi-bin/cpicalc.pl
