@misc{indiciae1e726314acf1,
  title = {Forbidden-line excitation data for certain coronal lines},
  author = {Czyzak, S. J. and Aller, L. H. and Euwema, R. N.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750038728},
  note = {Source identifier: 19750038728}
}