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Knoll AG; Schmidt
Chem. Zentralbl., 1930 , vol. 101, # I p. 1536
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Knoll A.G., Schmidt
Patent: US1926756 , 1929 ;
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Knoll A.G., Schmidt
Patent: FR671388 , 1929 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 17, p. 2613
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Knoll A.G., Schmidt
Patent: DE500435 , 1928 ;