Conversion Factors.

* For additional information, see American Society for Testing and Materials, Metric Practice Guide, ASTM E 380-72, 34 pp., 1973; International Organization of Standardization “International Stardt, SI Units, and Recommendations for the Use of their Multiples and Certain Other Units, “Ref. No. ISO 1000-1973(E), 21 pp., 1973; National Bureau of Standards, Engineering Standards, U.S. Metric Study, NBS SP 345-11, 250 pp., 1971. LENGTH