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Journal of the Chemical Society, 1948 , p. 2314
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Journal of the Indian Chemical Society, 1927 , vol. 4, p. 186
Chem. Zentralbl., 1927 , vol. 98, # II p. 1703
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Proceedings - Indian Academy of Sciences, Section A, 1943 , vol. <A> 18, p. 100,101