@conference{4565,
  author = {Catharine Garmany},
  title = {Is there an absolute magnitude calibration for O-type stars?},
  year = {1990},
  publisher = {Astronomical Society of the Pacific},
  isbn = {0-937707-24-4 	eISBN: 	978-1-58381-343-0},
  url = {http://articles.adsabs.harvard.edu/full/1990ASPC....7...16G},
  note = {JILA Pub. 4175},
}