@article{9464,
      author = {Bell, A. H. and Piersol, Robert James,},
      url = {http://library.usi.edu/record/9464},
      title = {The need for sand coring in the Southeastern Illinois oil  field /},
      publisher = {Illinois State Geological Survey,},
      recid = {9464},
      pages = {11 p. :},
      address = {Urbana :},
      year = {1931},
}