@misc{indiciae033e0f9f3644,
  title = {The unique cometary nebula Parsamian 13},
  author = {Cohen, M. and Aitken, D. K. and Roche, P. F. and Williams, P. M.},
  year = {1983},
  url = {https://ntrs.nasa.gov/citations/19840029431},
  note = {Source identifier: 19840029431}
}