Reference on Constants, Units and Uncertainty
CODATA internationally recommended values of the fundamental physical
constants, provided as symbols for direct use within the R language. Optionally,
the values with errors and/or the values with units are also provided if the
'errors' and/or the 'units' packages are installed. The Committee on Data
for Science and Technology (CODATA) is an interdisciplinary committee of the
International Council for Science which periodically provides the internationally
accepted set of values of the fundamental physical constants. This package
contains the "2014 CODATA" version, published on 25 June 2015:
Mohr, P. J., Newell, D. B. and Taylor, B. N. (2016)
<DOI:10.1103/RevModPhys.88.035009>, <DOI:10.1063/1.4954402>.

CODATA internationally recommended values of the fundamental
physical constants, provided as symbols for direct use within the R language.
Optionally, the values with uncertainties and/or units are also provided if
the 'errors', 'units' and/or 'quantities' packages are installed.
The Committee on Data for Science and Technology (CODATA) is an
interdisciplinary committee of the International Council for Science which
periodically provides the internationally accepted set of values of the
fundamental physical constants. This package contains the "2018 CODATA"
version, published on May 2019:
Eite Tiesinga, Peter J. Mohr, David B. Newell, and Barry N. Taylor (2020)
<http://physics.nist.gov/constants>.
errors (>= 0.3.6), units, quantities, testthat

CODATA internationally recommended values of the fundamental
physical constants, provided as symbols for direct use within the R language.
Optionally, the values with uncertainties and/or units are also provided if
the 'errors', 'units' and/or 'quantities' packages are installed.
The Committee on Data for Science and Technology (CODATA) is an
interdisciplinary committee of the International Council for Science which
periodically provides the internationally accepted set of values of the
fundamental physical constants. This package contains the "2018 CODATA"
version, published on May 2019:
Eite Tiesinga, Peter J. Mohr, David B. Newell, and Barry N. Taylor (2020)
<https://physics.nist.gov/cuu/Constants/>.