@article{10020,
      author = {Leary, Richard L.},
      url = {http://library.usi.edu/record/10020},
      title = {An early Pennsylvanian flora with Megalopteris and  Noeggerathiales from west-central Illinois /},
      publisher = {Illinois State Geological Survey,},
      recid = {10020},
      pages = {77 p. :},
      address = {Urbana :},
      year = {1977},
}