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  1. By: Argus, George W. (George William) - National Museum of Natural Sciences (Canada). Botany Division.
    Publication info: Ottawa, Botany Division, National Museum of Natural Sciences = Division de la botanique, Musée national des sciences naturelles, 1982-1987
    Holding Institution: Smithsonian Libraries and Archives
  2. By: Pendergast, James F. - National Museum of Natural Sciences (Canada). Botany Division.
    Publication info: Ottawa, National Museums of Canada, National Museum of Natural Sciences, 1982
    Holding Institution: Canadian Museum of Nature Library / Bibliothèque du Musée canadien de la nature