Title: CSA standard B1.1-1949 STANDARD FOR UNIFIED AND AMERICAN SCREW THREADS
Description: Established as result of  "1948 Declaration of  Accord with respect to the Unification of Screw Threads" between Canada, United States of America and Great Britian.  British Standards Institution, Canadian Standards Association, and American Standards Association were the Standards Development Organizations signatory to the agreement.
Subjects: mechanical standards, tr-national, multi-national.
Places: Ottawa
People: N. P. Petersen, J.G. Morrow
Time periods: 1949