@article{25640,
      author = {Knight, Richard L.},
      url = {http://library.usi.edu/record/25640},
      title = {The common raven /},
      publisher = {U.S. Dept. of the Interior, Bureau of Land Management ,},
      recid = {25640},
      pages = {ii, 60 p. :},
      address = {Denver :},
      year = {1980},
}