697. ------. [FISCHER, F., AND TROPSCH, H.] [Hydrocarbon Synthesis From Carbon Monoxide and Hydrogen.] German Patent 577,069, no date. Schmidt, J., Dad Kohlenoxyd, Akad. Verlagsgesell., Leipzig, 1950, p. 174.

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697. ------. [FISCHER, F., AND TROPSCH, H.] [Hydrocarbon Synthesis From Carbon Monoxide and Hydrogen.] German Patent 577,069, no date. Schmidt, J., Dad Kohlenoxyd, Akad. Verlagsgesell., Leipzig, 1950, p. 174.