
Older values of the constants
Archive of older articles and tables of values
Detailed description of the 1998 adjustment, including the covariance matrix of selected constants: P. J. Mohr and B. N. Taylor, Rev. Mod. Phys. 72(2), 351495 (2000)P. J. Mohr and B. N. Taylor, J. Phys. Chem. Ref. Data 28(6), 17131852 (1999)
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