1. Document U.I.P. 20 (1978): Symbols, units and nomenclature in physics, Physica 93A1–60 (1978)
2. D.N. Lapedes (ed.): McGraw-Hill Dictionary of Physics and Mathematics ( McGraw-Hill, New York 1978 )
3. P.W. Bridgman: Dimensional Analysis, 2nd ed. ( Yale University Press, New Haven 1932 )
4. Report of the CODATA Task Group on Fundamental Constants, August 1973: “Recommended Consistent Values of the Fundamental Constants, 1973”, Codata Bull., No. 11 (December 1973)
5. E.R. Cohen, B.N. Taylor: J. Phys. Chem. Ref. Data 2, 663–734 (1973)