@article{350573,
      recid = {350573},
      author = {Walters, Ronald M.},
      title = {Visual quality objectives in douglas-fir forests /},
      publisher = {U.S. Dept. of Agriculture, Forest Service, Pacific  Northwest Region,},
      address = {Portland, OR :},
      pages = {183 p. :},
      year = {1992},
      note = {Shipping list no.: 92-0122-P.},
      url = {http://library.usi.edu/record/350573},
}