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Chicago style: Acronym Finder . S.v. "X." Retrieved May 22 2012 from http://www.acronymfinder.com/50-Proof-(Alcoholic-Beverages)-(X).html
APA style: X. (n.d.) Acronym Finder. (2012). Retrieved May 22 2012 from http://www.acronymfinder.com/50-Proof-(Alcoholic-Beverages)-(X).html

50 Proof (Alcoholic Beverages)

This definition appears very rarely

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Wet Ziekenhuisvoorzieningen (Dutch: Hospital Facilities Act) West Zeeuws Vlaanderen (The Netherlands) Wyner-Ziv Vector Quantizer WarZone Wrestling Wess-Zumino-Witten (physics) Wirusowe Zapalenie Watroby (liver disease) Wonen Zorg Welzijn (Dutch: Housing Care Welfare) Wrestle Zone Wrestling [not an acronym] Last name taken by some Nation of Islam members 10 (Roman numeral)		8-12 GHz frequency band Axis (ophthalmological-related) Behind the Goal (Lacrosse) Brigade (Graphical Representation/Army) Christ Corporation (IRB) Cross École Polytechnique (French famous university) Ecstasy Ex (former)

Samples in periodicals archive:

It's about 30 to 50 proof and all sellers had a handy sampler for prospective customers .

``So far, we're up to 50 proof of burglaries we've had to send to stores, and more keep coming in every day.