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Please read BHL's Acknowledgment of Harmful Content
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  1. By: McCalla, William Copeland.
    Publication info: Toronto, Musson Book Co, 1920
    Holding Institution: Internet Archive
  2. By: McCalla, William Copeland.
    Publication info: Toronto, Musson Book Co, [1920]
    Holding Institution: University of Toronto - Gerstein Science Information Centre