@article{23200,
      recid = {23200},
      author = {Lowenstam, Heinz Adolf,},
      title = {Biostratigraphic studies of the Niagaran inter-reef  formations in northeastern Illinois.},
      address = {Springfield,},
      pages = {146 p.},
      year = {1948},
      url = {http://library.usi.edu/record/23200},
}