@misc{indiciae2e42b45cdd77,
  title = {Sampling the cometary nucleus},
  author = {Clark, B. C. and Amundsen, R. J. and Blanchard, D. P.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19870015702},
  note = {Source identifier: 19870015702}
}