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  1. By: Weatherby, Charles Alfred,
    Publication info: [Not after 1941]
    Holding Institution: Harvard University Botany Libraries
    Subjects: 1827-1895  Ferns  Lawson, George,  Type specimens  
    BHL Collections: BHL Field Notes Project
  2. Publication info: [Halifax, N.S.?, s.n.], 1874
    Holding Institution: Canadiana.org
    Subjects: 1827-1895  Botanists  Canada  Employment references  Lawson, George,