Reference Label	Details
Parker 1965	V. B. Parker, "Thermal Properties of Aqueous Uni-Univalent Electrolytes", NSRDS-NBS 2, US Gov. Printing Office: Washington, DC 1965
as quoted by CODATA Key Vals	as quoted by CODATA Key Vals
Olofsson 1975a	G. Olofsson, J. Chem. Thermodyn. 7, 507-514 (1975) Thermodynamic Quantities for the Dissociation of the Ammonium Ion and for the Ionization of Aqueous Ammonia over a Wide Temperature Range