@article{10645,
  author = {D. van Blerkom},
  title = {Mass loss from P Cygni - The evidence of the Balmer lines},
  year = {1978},
  journal = {The Astrophysical Journal},
  volume = {221},
  pages = {186},
  month = {Jan-04-1978},
  issn = {0004-637X},
  url = {http://adsabs.harvard.edu/doi/10.1086/156016},
  doi = {10.1086/156016},
}