参考文献
Kalle and Co.
Patent: DE248083 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 10, p. 540
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Kalle and Co.
Patent: DE236536 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 10, p. 538,539
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Kalle and Co.
Patent: DE243536 ;
Full Text Show Details
Kalle and Co.
Patent: DE232714 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 10, p. 534,536
Full Text Show Details
Kalle and Co.
Patent: DE233473 ;
