@misc{indiciaed385e740c93c,
  title = {The CRAF mission and Earth-based comet observations},
  author = {Weissman, Paul R. and Neugebauer, Marcia},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910011734},
  note = {Source identifier: 19910011734}
}