@article{20878,
      recid = {20878},
      author = {Wier, Charles Eugene, and Esarey, Ralph E.},
      title = {Pennsylvanian geology and mineral resources of west  central Indiana /},
      publisher = {Indiana Dept. of Conservation, Geological Survey,},
      address = {Bloomington :},
      pages = {34 leaves, [4] leaves of plates :},
      year = {1951},
      url = {http://library.usi.edu/record/20878},
}