@article{33286,
      author = {Clark, Ronnie D.},
      url = {http://library.usi.edu/record/33286},
      title = {Erosion condition classification system /},
      publisher = {Bureau of Land Management, U.S. Dept. of the Interior,},
      recid = {33286},
      pages = {iv, 47 p. :},
      address = {Denver :},
      year = {1980},
}