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  1. By: Kauffman, C. H. (Calvin Henry),
    Publication info: Lansing, Mich :W.H. Crawford, state printers,1918.
    Holding Institution: University of Michigan (archive.org)
  2. By: Kauffman, C. H. (Calvin Henry),
    Publication info: Lansing, Mich.,W. H. Crawford Co., state printers,1918.
    Holding Institution: New York Botanical Garden, LuEsther T. Mertz Library
    BHL Collections: New York Botanical Garden
  3. By: Kauffman, C. H. (Calvin Henry),
    Publication info: [S.l.],1905.
    Holding Institution: University Library, University of Illinois Urbana Champaign