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  1. Second contribution to the studies on the Cambrian faunas of North America by Charles Doolittle Walcott.
    By: Walcott, Charles D. (Charles Doolittle), - United States. Geological Survey.
    Publication info: Washington :G.P.O.,1886.
    Holding Institution: Canadiana.org (archive.org)
    Subjects: Arthropoda, Fossil  Cambrian  Cambrien  Canada  Paleontology  United States  
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