@misc{indiciae94e8cdfe7e9e,
  title = {Could Mars be dark and altered?},
  author = {Wendy M. Calvin},
  year = {1998},
  doi = {10.1029/98gl01255},
  url = {https://pubs.usgs.gov/publication/70185200},
  note = {Source identifier: 70185200}
}