@article{200498,
      note = {Distributed to depository libraries in microfiche.},
      author = {Paskevich, Valerie F.},
      url = {http://library.usi.edu/record/200498},
      title = {Conversion of raster image data to vector cartographic  data [microform] /},
      publisher = {U.S. Geological Survey ;},
      recid = {200498},
      pages = {15 leaves :},
      address = {Reston, VA :},
      year = {1991},
}