@misc{indiciaee506ad8753fe,
  title = {Was early Mars warmed by ammonia?},
  author = {Kasting, J. F. and Brown, L. L. and Acord, J. M. and Pollack, J. B.},
  year = {1992},
  url = {https://ntrs.nasa.gov/citations/19920019787},
  note = {Source identifier: 19920019787}
}