@misc{indiciae71b458f1afda,
  title = {Modern Observational Techniques for Comets},
  author = {Brandt, J. C. and Greenberg, J. M. and Donn, B. and Rahe, J.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19820006116},
  note = {Source identifier: 19820006116}
}