@article{10363,
  author = {B. Bohannan and Peter Conti},
  title = {Spectroscopic studies of O-type binaries.1 BD +40 4220 : an enigma ripe for resolution.},
  year = {1976},
  journal = {The Astrophysical Journal},
  volume = {204},
  pages = {797},
  month = {Jan-02-1976},
  issn = {0004-637X},
  url = {http://adsabs.harvard.edu/full/1976ApJ...204..797B},
  doi = {10.1086/154227},
}