@misc{indiciae45b7d34a33fa,
  title = {The Viking landing sites: Selection and certification},
  author = {H. Masursky and N.L. Crabill},
  year = {1976},
  doi = {10.1126/science.193.4255.809},
  url = {https://pubs.usgs.gov/publication/70010943},
  note = {Source identifier: 70010943}
}