@misc{indiciae39882e1ddc99,
  title = {A study of ion composition and dynamics at Comet Halley},
  author = {Shelley, E. G. and Fuselier, S. A.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19930004277},
  note = {Source identifier: 19930004277}
}