21. Handbook. 44. [Specification, tolerance, and other technical requirements for commercial weighing and measuring devices adopted by National Conference on Weights and Measures, 3d edition, 1965], 1970 replacement sheets. Bookmark Corporate/Agency Authors: National Bureau of Standards and Commerce Dept. Publisher: National Bureau of Standards Date: [1970.] SuDoc number: C 13.11:44/3/rev.pages 970