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Elliott, K. A., and Baker, Z. (1935). The effects of oxidation-reduction potential indicator dyes 

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, see also Conant and Fieser (1925). 



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, see also Knight and Fildes (1930, 1933). 



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Flexner, L. B., and Barron, E. S. G. (1930). Oxidation-reduction potentials at carbon and tungsten 



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, see also Michaelis and Flexner (1928). 



Fred, E. B., see Ingraham and Fred (1933). 



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