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参考文献
Shell Devel. Co. Patent: US2418173 , 1944 ; Full Text Show Details Gen.Aniline and Film Corp. Patent: US2218587 , 1938 ; Full Text Show Details I.G.Farbenind. Patent: DE693988 , 1937 ; DRP/DRBP Org.Chem.
Shell Devel. Co. Patent: US2418173 , 1944 ; Full Text Show Details Gen.Aniline and Film Corp. Patent: US2218587 , 1938 ; Full Text Show Details I.G.Farbenind. Patent: DE693988 , 1937 ; DRP/DRBP Org.Chem.