@article{13484,
      author = {Gough, L. P.},
      url = {http://library.usi.edu/record/13484},
      title = {Element concentrations toxic to plants, animals, and man  /},
      publisher = {U.S. Govt. Print. Off., c 1979.},
      recid = {13484},
      pages = {iii, 80 p.},
      address = {Washington :},
}