Following are some public domain reference works which may be useful.
This is Volume 9 Part 3 of the Bulletin of the Bureau of Standards. It contains the original research and results on alcohol and water mixtures upon which the current gauging regimen is based. Authored by Osborn & Pearce who were the principal investigators. This is a 4Mb file and will take some time to open. You might want to download it first and then give your Adobe Reader a minute or two to open it.
This is the Art ofBlending and Compounding Liquors.It is an older work but gives an idea of what processes and procedures are used to make different types of spirits.Some of the formulas are out dated and would never be approved in this day and age but many are still viable or their processes can be applied to new variations in blending.
This a recent water quailty report for the Morgantown Utility Board. This report gives an overview of many of the water considerations which a distiller must contend with in producing a quality product. The West Virginia Distilling Co. is fortunate to have such high quality water to conduct its operations with.
Official Methods Of Analysis (1916): Table 7, which begins on page 345 of the book and 362 of the document, is a U.S. Bureau of Standards table for calculating percentage of Alcohol in mixtures by specific Gravity. This is essentially the same table as Table 6 except it is calculated using a temperature of 20°C which is 68°F rather than 60°F as is Table 6.
The International System of Unit (SI) as defined by the NIST and the United States Departmet of Commerce.Contains the basic definitions of length, mass, time, electric current, temperature amount of substance and luminous intensity used in the SI system.Useful when looking up basic constants to use for calculations.