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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Hesse, Bernhard Conrad.
    Publication info: Washington, Govt. print. off, 1912
    Holding Institution: University of California Libraries
    Subjects: Coal-tar colors  Coloring matter in food  
  2. By: Price, Thomas Malcolm.
    Publication info: [Washington, G.P.O.], 1911
    Holding Institution: University of Florida, George A. Smathers Libraries
    Subjects: Coal-tar colors