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84. ----------------. [ARMSTRONG, E. F., AND HILDITCH, T. P.] Study of Catalytic Actions at Surfaces. XI. Action of Alumina and Other Oxides in Promoting the Activity of Ni Catalyst. Proc. Roy. Soc. (London), vol. 103-A, 1923, pp. 586-597; Chem. Abs., vol. 17, 1923, p. 3443.