@misc{indiciae4cd5de6e1a5a,
  title = {Neutral cometary atmospheres. V - C2 and CN in comets},
  author = {Combi, M. R. and Delsemme, A. H.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870029371},
  note = {Source identifier: 19870029371}
}