@article{17292,
      author = {Lamar, J. E.},
      url = {http://library.usi.edu/record/17292},
      title = {Siliceous materials of extreme southern Illinois: silica,  novaculite, ganister, calico rock, and chert gravels.},
      recid = {17292},
      pages = {38 p.},
      address = {Urbana,},
      year = {1953},
}