Alcohol proof (English Wikipedia)

Klein, H. Arthur (1974). The World of Measurements: Masterpieces, Mysteries and Muddles of Metrology. Simon and Schuster. p. 564. ISBN 9780671215651. The concept of a standard or normative 'proof' strength was operative in Britain from the early days of the burn-or-no-burn tests. It paralleled the normative concepts of applied to brewing...

doi.org (Global: 2^nd place; English: 2^nd place)

Jensen, William B. (September 2004). "The Origin of Alcohol 'Proof'" (PDF). Journal of Chemical Education. 81 (9): 1258–1259. Bibcode:2004JChEd..81.1258J. doi:10.1021/ed081p1258. Archived from the original (PDF) on 8 July 2014. Retrieved 17 July 2014.

"Alcohol". The Report of the Canadian Government Commission of Inquiry into the Non-Medical Use of Drugs. Drug Library. 1972.

"Section 6: Sale and Distribution". Scotch Whisky: Questions and Answers. Scotch Whisky Association. 1995. Retrieved 3 October 2020.

"Ethanol Freeze Protected Water Solutions". Engineering Toolbox. 2005. Retrieved 12 May 2020.

"Title 27 Alcohol, Tobacco and Firearms, Chapter 1, §5.37" (PDF). Code of Federal Regulations. Bureau of Alcohol, Tobacco and Firearms; Department of the Treasury. 1 April 2000. p. 61. Archived (PDF) from the original on 4 March 2021.

"Labelling requirements for alcoholic beverages". Canadian Food Inspection Agency. 23 April 2015. Archived from the original on 28 February 2014. Retrieved 27 February 2014.

Recommendation No. 22, International Alcoholmetric Tables (PDF). Paris: International Bureau of Legal Metrology. Archived (PDF) from the original on 4 November 2013.

Jensen, William B. (September 2004). "The Origin of Alcohol 'Proof'" (PDF). Journal of Chemical Education. 81 (9): 1258–1259. Bibcode:2004JChEd..81.1258J. doi:10.1021/ed081p1258. Archived from the original (PDF) on 8 July 2014. Retrieved 17 July 2014.

Jensen, William B. (September 2004). "The Origin of Alcohol 'Proof'" (PDF). Journal of Chemical Education. 81 (9): 1258–1259. Bibcode:2004JChEd..81.1258J. doi:10.1021/ed081p1258. Archived from the original (PDF) on 8 July 2014. Retrieved 17 July 2014.
Recommendation No. 22, International Alcoholmetric Tables (PDF). Paris: International Bureau of Legal Metrology. Archived (PDF) from the original on 4 November 2013.
"Title 27 Alcohol, Tobacco and Firearms, Chapter 1, §5.37" (PDF). Code of Federal Regulations. Bureau of Alcohol, Tobacco and Firearms; Department of the Treasury. 1 April 2000. p. 61. Archived (PDF) from the original on 4 March 2021.
"Labelling requirements for alcoholic beverages". Canadian Food Inspection Agency. 23 April 2015. Archived from the original on 28 February 2014. Retrieved 27 February 2014.