), "International Critical Tables of Numerical Data, Physics, Chemistry and Technology" (1926–1930; 2003 Knovel online version)*: (a) Gray and Ramsay, "Proceedings of the Royal Society" (London).
), "International Critical Tables of Numerical Data, Physics, Chemistry and Technology" (1926–1930; 2003 Knovel online version)*: (a) Gray and Ramsay, "Proceedings of the Royal Society" (London).