Hall, Norris F. (March 1940). "Systems of Acids and Bases". Journal of Chemical Education17 (3): 124–128. doi:10.1021/ed017p124. Bibcode: 1940JChEd..17..124H.
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Hall, Norris F. (March 1940). "Systems of Acids and Bases". Journal of Chemical Education17 (3): 124–128. doi:10.1021/ed017p124. Bibcode: 1940JChEd..17..124H.