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National developed dyes for cotton yarn / manufactured by National Aniline & Chemical Company, Inc. (1917)
National Aniline and Chemical Company · New York : The Company · leaf 20
— — = _—_ a National Diazine Black V Black H Extra Dev. DB re Direct ‘ National Diazine Beta Black NDyes and dyeing -- Cotton
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
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