@article{8680,
  author = {S. Voels and B. Bohannan and D. Abbott and David Hummer},
  title = {Enhanced Helium Abundance in O Supergiants},
  year = {1987},
  journal = {Bulletin of the American Astronomical Society},
  volume = {19},
  pages = {1025},
  month = {09/\textquoteleft1987},
  url = {http://adsabs.harvard.edu/full/1987BAAS...19.1025V},
}