D'Amore, Franco; Celati, Romano & Calore, Claudio. Hypotheses on Possible Equilibria Between N{sub2} and Other Gases at Larderello and Cerro Prieto, article, December 15, 1983; (https://digital.library.unt.edu/ark:/67531/metadc875455/m1/1/: accessed July 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .