参考文献

Eastman Kodak Co. Patent: US2450131 , 1946 ; Full Text Show Details Eastman Kodak Co. Patent: US2450118 , 1947 ; Full Text Show Details Eastman Kodak Co. Patent: US2450116 , 1947 ; Full Text Show Details Eastman Kodak Co. Patent: US2450117 , 1947 ; Full Text Show Details Hagemeyer Industrial and Engineering Chemistry, 1949 , vol. 41, p. 769 Full Text Show Details Eastman Kodak Co. Patent: US2450133 , 1946 ;