@misc{indiciae8131dd11f66e,
  title = {Ethane abundance on Neptune},
  author = {Kostiuk, Theodor and Espenak, Fred and Romani, Paul and Zipoy, David and Goldstein, Jeff},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910031719},
  note = {Source identifier: 19910031719}
}