@article{19467,
      author = {Vankat, John L.,},
      url = {http://library.usi.edu/record/19467},
      title = {The natural vegetation of North America : an introduction  /},
      publisher = {Wiley,},
      recid = {19467},
      pages = {ix, 261 p. :},
      address = {New York :},
      year = {1979},
}