@misc{indiciaecf80c8bd32c8,
  title = {The Palomar planet-crossing asteroid survey, 1973-1978},
  author = {E. F. Helin and E.M. Shoemaker},
  year = {1979},
  doi = {10.1016/0019-1035(79)90021-6},
  url = {https://pubs.usgs.gov/publication/70012284},
  note = {Source identifier: 70012284}
}