@misc{indiciaecd440c21b77d,
  title = {Far ultraviolet excitation processes in comets},
  author = {Feldman, P. D. and Opal, C. B. and Meier, R. R. and Nicolas, K. R.},
  year = {1976},
  url = {https://ntrs.nasa.gov/citations/19760013996},
  note = {Source identifier: 19760013996}
}