@article{10032,
  author = {F. Clark and D. Buhl and L. Snyder},
  title = {Observational Evidence for the Excitation of HCN and H20 in Protostellar Molecular Clouds},
  year = {1974},
  journal = {The Astrophysical Journal},
  volume = {190},
  pages = {545},
  month = {Jan-06-1974},
  issn = {0004-637X},
  url = {http://adsabs.harvard.edu/full/1974ApJ...190..545C},
  doi = {10.1086/152909},
}