Mechtly, E. A. (1973). The international system of units: Physical constants and conversion factors (2nd revision.). Washington: Scientific and Technical Information Off., National Aeronautics and Space Administration.
Chicago Style CitationMechtly, E. A. The International System of Units: Physical Constants and Conversion Factors. 2nd revision. Washington: Scientific and Technical Information Off., National Aeronautics and Space Administration, 1973.
MLA CitationMechtly, E. A. The International System of Units: Physical Constants and Conversion Factors. 2nd revision. Washington: Scientific and Technical Information Off., National Aeronautics and Space Administration, 1973.
Warning: These citations may not always be 100% accurate.