United States. National Bureau of Standards.
United States. Interdepartmental Screw Thread Committee.
United States. Federal Supply Service
United States. Interdepartmental Screw Thread Committee
American Society of Mechanical Engineers. Steering Committee on "Screw-Thread Gaging Systems".
United States. General Services Administration. Office of Federal Supply and Services
International Organization for Standardization.
United States. National Screw Thread Commission.
United States. National Screw Thread Commission
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Shemuʼel Kohen