@article{77524,
      author = {Jacobson, Jay S., and Hill, A. Clyde,},
      url = {http://library.usi.edu/record/77524},
      title = {Recognition of air pollution injury to vegetation: a  pictorial atlas.},
      publisher = {Air Pollution Control Association,},
      recid = {77524},
      pages = {1 v. (various pagings)},
      address = {Pittsburgh, Pa.,},
      year = {1970},
}