@article{4497,
      url = {http://library.usi.edu/record/4497},
      title = {Silurian reefs of Great Lakes region of North America :  selected papers reprinted from Structure of typical  American oil fields, vol. III, and AAPG bulletin.},
      publisher = {American Association of Petroleum Geologists,},
      recid = {4497},
      pages = {243 p. :},
      address = {Tulsa, Okla. :},
      year = {1975},
}