@misc{indiciae1217699236b4,
  title = {Groundwater formation of martian valleys},
  author = {M. C. Malin and M. H. Carr},
  year = {1999},
  doi = {10.1038/17551},
  url = {https://pubs.usgs.gov/publication/70021910},
  note = {Source identifier: 70021910}
}