@misc{indiciaedb7c07f6debf,
  title = {Comet Halley returns: A teachers' guide 1985-1986},
  author = {Chapman, R. D. and Bondurant, R. L.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19850027526},
  note = {Source identifier: 19850027526}
}