Fry
Journal of the American Chemical Society, 1949 , vol. 71, p. 3238
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Barry; Boyer
Canadian Journal of Research, Section B: Chemical Sciences, 1948 , vol. 26, p. 511,515
Young; Hartung; Crossley
Journal of the American Chemical Society, 1936 , vol. 58, p. 101
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Schimmel and Co., Ponndorf
Patent: DE535954 , 1924 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 17, p. 579