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Cellitechtfarben = Cellit fast colours = Colorants cellit solides (1880)
Farbenfabriken vorm. Friedrich Bayer & Co · Leverkusen b. Köln a. Rh. : Farbenfabriken vorm. Fried. Bayer & Co. · leaf 15
Farbenfabriken vorm. Friedr. Bayer & Co., Leverkusen b. Köln a. Rhein.Dyes and dyeing -- Textile fibers
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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