@misc{indiciae1122dad0f686,
  title = {The work on Comet Halley's orbit at ESOC},
  author = {Morley, T. and Hechlery, F.},
  year = {1984},
  url = {https://ntrs.nasa.gov/citations/19850016730},
  note = {Source identifier: 19850016730}
}