@misc{indiciae678ad806f794,
  title = {Ionization equilibrium of interstellar nitrogen - A probe for the intercloud medium},
  author = {Geldon, F. M. and Steigman, G. and Werner, M. W.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710059715},
  note = {Source identifier: 19710059715}
}