Müller, Edith A.; Jappel, A., eds. (1977), "Report of Joint Meeting of Commissions 4, 8, 31 on the New System of Astronomical Constants", Proceedings of the Sixteenth General Assembly Grenoble 1976, Transactions of the International Astronomical Union, vol. 16B, Dordrecht, Holland: D. Reidel, pp. 52–67, ISBN90-277-0836-3. Refer to subsection "Recommendations to IAU General Assembly, 1976" on pages 58-61 for specific values.
Müller, Edith A.; Jappel, A., eds. (1977), "Commision 4: Ephemerides, Report of Meeting 25 August 1976", Proceedings of the Sixteenth General Assembly Grenoble 1976, Transactions of the International Astronomical Union, vol. 16B, Dordrecht, Holland: D. Reidel, pp. 49–52, ISBN90-277-0836-3. See page 50, specifically.
Standish, E.M. (1995), "Report of the IAU WGAS Sub-group on Numerical Standards", in Appenzeller, I. (ed.), Highlights of Astronomy(PDF), Dordrecht: Kluwer, archived from the original(PDF) on 2012-09-07
nist.gov
physics.nist.gov
CODATA System of Physical Constants of 1973, CODATA Bulletin No. 11 [1]Archived 2017-01-07 at the Wayback Machine
Standish, E.M. (1995), "Report of the IAU WGAS Sub-group on Numerical Standards", in Appenzeller, I. (ed.), Highlights of Astronomy(PDF), Dordrecht: Kluwer, archived from the original(PDF) on 2012-09-07