@article{626834,
      recid = {626834},
      title = {State of Arkansas : 1990 /},
      publisher = {Geological Survey,},
      address = {Reston, Va. :},
      pages = {1 map :},
      year = {1990},
      note = {Relief shown by contours and spot heights.},
      url = {http://library.usi.edu/record/626834},
}