Geuther
Justus Liebigs Annalen der Chemie, 1884 , vol. 226, p. 223

C.F. Boehringer and Soehne
Patent: FR696530 ;

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C.F. Boehringer and Soehne
Patent: DE553605 , 1928 ;

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C.R. Boehringer and Soehne
Patent: US1859786 , 1929 ;

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C.R. Boehringer and Soehne
Patent: US1859785 , 1929 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 18, p. 788

C.F. Boehringer and Soehne
Patent: FR696530 ;

Full Text Show Details
C.F. Boehringer and Soehne
Patent: DE553605 , 1928 ;

Full Text Show Details
C.R. Boehringer and Soehne
Patent: US1859786 , 1929 ;

Full Text Show Details
C.R. Boehringer and Soehne
Patent: US1859785 , 1929 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 18, p. 788