@misc{indiciae057afa44a33d,
  title = {Imaging on ballistic missions to comet Encke},
  author = {Jaffe, L. D. and Bender, D. and Hughes, R. O. and Markiewicz, B. R. and Thorpe, T. E.},
  year = {1975},
  url = {https://ntrs.nasa.gov/citations/19750034227},
  note = {Source identifier: 19750034227}
}