@article{155030,
      author = {Heigold, Paul C. and Whitaker, Stephen T.},
      url = {http://library.usi.edu/record/155030},
      title = {A gravity survey of Marine Field : case study for Silurian  reef exploration /},
      publisher = {Illinois State Geological Survey,},
      recid = {155030},
      pages = {19 p. :},
      address = {Champaign, Ill. :},
      year = {1989},
}