@misc{indiciaefc40608372c7,
  title = {Are low-activity comets intrinsically different from more active comets?},
  author = {Cochran, Anita L. and Green, Jacklyn R. and Barker, Edwin S.},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890054097},
  note = {Source identifier: 19890054097}
}