@misc{indiciaeb97ce0987596,
  title = {Ammonia in comet P/Halley},
  author = {Meier, R. and Eberhardt, P. and Krankowsky, D. and Hodges, R. R.},
  year = {1994},
  url = {https://ntrs.nasa.gov/citations/19950057183},
  note = {Source identifier: 19950057183}
}