@misc{indiciae29638e2b90ed,
  title = {Faint optical emission lines from the interstellar medium - Limits on the temperature and ionization state of the emitting gas},
  author = {Reynolds, R. J. and Roesler, F. L. and Scherb, F.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770034809},
  note = {Source identifier: 19770034809}
}