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Dozenal Society of America
Promoting base twelve and alternative base mathematics
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The Dozenal Society of America
The DSA is a voluntary, nonprofit education corporation, organized for the conduct of research and education of the public in the use of dozenal (also called duodecimal or base-twelve) in calculations, mathematics, weights and measures, and other branches of pure and applied science.

A Brief Introduction to Dozenal Counting

Title: A Brief Introduction to Dozenal Counting
Author: Prof. Gene Zirkel
Year: 11X3
Subject: Basics of base-twelve (dozenal) counting
http://www.dozenal.org/../sites_bck/default/files/db38206_0.pdf