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79. ----------------. [ARMSTRONG, E. F., AND HILDITCH, T. P.] Study of Catalytic Actions at Surfaces. VI. Surface Area and Specific Nature of a Catalyst – Two Independent Factors Controlling the Resultant Activity. Proc. Roy. Soc. (London), vol. 99-A, 1921, pp. 490-495; Chem. Abs., vol. 16, 1922, pp. 188-189.