@article{200782,
      note = {Distributed to depository libraries in microfiche.},
      author = {Kolpin, Dana W. and Burkart, M. R.},
      url = {http://library.usi.edu/record/200782},
      title = {Work plan for regional reconnaissance for selected  herbicides and nitrate in ground water of the mid-continent  United States, 1991 [microform] /},
      publisher = {U.S. Geological Survey ;},
      recid = {200782},
      pages = {iv, 18 p. :},
      address = {Iowa City, Iowa :},
      year = {1991},
}