This page and the sub pages under it contain useful public domain information published by the TTB for the benefit of the distilling industry.
This is a complete version of the Beverage Alcohol Manual which is also available chapter by chapter at the TTB site. http://www.ttb.gov/index.shtml.
This is a very useful spreadsheet for anyone adding flavoring materials to alcohol blends. It is published by the TTB and is also available at the TTB site. http://www.ttb.gov/index.shtml.