参考文献
Carbide and Carbon Chem. Corp.
Patent: DE665792 , 1935 ;
Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 25, p. 491
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Union Carbide and Carbon Corp.
Patent: US2090485 , 1934 ;
Full Text Show Details
Union Carbide and Carbon Corp.
Patent: FR792046 , 1935 ;