@misc{indiciae63f85482ea01,
  title = {Three Mars years: Viking Lander 1 imaging observations},
  author = {R. E. Arvidson and E.A. Guinness and H. J. Moore and J. Tillman and S. D. Wall},
  year = {1983},
  doi = {10.1126/science.222.4623.463},
  url = {https://pubs.usgs.gov/publication/70012088},
  note = {Source identifier: 70012088}
}