220-3X

Editor: Henry Churchman
Associate Editor:
Volume: 22
Issue: 0
Whole Number: 3X
Year: 1183
Subject: “Winchester Declarations”; Dozenal measurement (metronic system); Slide rules
http://www.dozenal.org/drupal/sites_bck/default/files/DuodecimalBulletinIssue220-web_0.pdf