Reference Label	Details
Vanderzee 1972a	C. E. Vanderzee, D. L. King, and I. Wadsö, J. Chem. Thermodyn. 4, 685-689 (1972) The Enthalpy of Ionization of Aqueous Ammonia
Becker 1934	G. Becker and W. A. Roth, Z. Elektrochem. angew. phys. Chem. 40, 836-843 (1934) Die Bildungswärme vom Ammoniak und Salpetersäure
as quoted by CODATA Key Vals	as quoted by CODATA Key Vals