@article{3520,
      author = {Carpenter, G. L.},
      url = {http://library.usi.edu/record/3520},
      title = {Oil development and production in Indiana during 1971,},
      publisher = {[Geological Survey]},
      recid = {3520},
      pages = {20 p.},
      address = {Bloomington, Ind.},
      year = {1973},
}