@article{4760,
  author = {Jack Baldwin and Gary Ferland and P. Martin and M. Corbin and Stephen Cota and B. Peterson and Arne Slettebak},
  title = {Physical conditions in the Orion Nebula and an assessment of its helium abundance},
  year = {1991},
  journal = {The Astrophysical Journal},
  volume = {374},
  pages = {580},
  month = {Jan-06-1991},
  issn = {0004-637X},
  url = {http://articles.adsabs.harvard.edu/full/1991ApJ...374..580B},
  doi = {10.1086/170146},
}