@misc{indiciae8e6897a9c25d,
  title = {How to make a comet},
  author = {Stephens, J. and Saunders, R. S. and Fanale, F.},
  year = {1986},
  url = {https://ntrs.nasa.gov/citations/19860017691},
  note = {Source identifier: 19860017691}
}