Terms sourced from: https://doi.org/10.1103/RevModPhys.80.633
"Recommended Values of the Fundamental Physical Constants", Mohr, P.J., Taylor, B.N., and Newell, D.B., Reviews of Modern Physics 2006, 80(2), 633
"Recommended Values of the Fundamental Physical Constants", Mohr, P.J., Taylor, B.N., and Newell, D.B., Reviews of Modern Physics 2006, 80(2), 633