CODATA Internationally recommended values of the fundamental physicsl constant 详细网址: http://physics.nist.gov/cuu/Constants/index.html Fundamental Physical Constants — Frequently used constants(2010)
http://www.bipm.org/en/CGPM/db/13/1/ SI unit of time (second) * The 13th Conférence Générale des Poids et Mesures (CGPM), considering that the definition of the second adopted by the Comité International des Poids et Mesures (CIPM) in 1956 (Resolution ...
http://www.bipm.org/en/CGPM/db/15/2/ Resolution 2 of the 15th meeting of the CGPM (1975) Recommended value for the speed of light * The 15th Conférence Générale des Poids et Mesures, considering the excellent agreement among the results of wav ...