@misc{indiciae5a1f4622acff,
  title = {Ionization in nearby interstellar gas},
  author = {Frisch, P. C. and Welty, D. E. and York, D. G. and Fowler, J. R.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900054740},
  note = {Source identifier: 19900054740}
}