@conference{4491,
  author = {B. Bohannan},
  title = {Of/WN: More than a morphological distinction?},
  year = {1990},
  publisher = {San Francisco, CA, Astronomical Society of the Pacific},
  address = {Boulder, Colorado},
  url = {http://adsabs.harvard.edu/full/1990ASPC....7...39B},
  note = {JILA Pub. 4161},
}