@article{229364,
      author = {Schopf, James M. and Schwietering, J. F.},
      url = {http://library.usi.edu/record/229364},
      title = {The Foerstia zone of the Ohio and Chattanooga shales,},
      publisher = {U.S. Govt. Print. Off.,},
      abstract = {An explanation for the stratigraphic zonation of the  fossils and a report on a newly discovered occurrence of  the Foertia zone in western Ohio.},
      recid = {229364},
      pages = {iii, 15 p. :},
      address = {Washington,},
      year = {1970},
}