参考文献

Bayer and Co. Patent: DE67829 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 3, p. 447,449 Full Text Show Details Bayer and Co. Patent: DE71836 ; Full Text Show Details Bayer and Co. Patent: DE54116 ; Fortschr. Teerfarbenfabr. Verw. Industriezweige, vol. 2, p. 315