@article{19259,
      author = {Biggs, Donald Lee. and Lamar, J. E.},
      url = {http://library.usi.edu/record/19259},
      title = {Sandstone resources of extreme southern Illinois, a  preliminary report},
      recid = {19259},
      pages = {21 p.},
      address = {Urbana},
      year = {1955},
}