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Please read BHL's Acknowledgment of Harmful Content
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  1. By: Lawson, Andrew C. (Andrew Cowper), - Walcott, Charles D. (Charles Doolittle),
    Publication info: Ottawa, Canada Dept. of Mines, Geological Survey Branch, 1912
    Holding Institution: University of Toronto - Gerstein Science Information Centre
    Subjects: Canada  Geology  Ontario  Paleontology  Steeprock Lake