@misc{indiciae8ed1e32ceec8,
  title = {Geological framework of the south polar region of Mars},
  author = {B. C. Murray and L.A. Soderblom and J.A. Cutts and R.P. Sharp and D.J. Milton and R.B. Leighton},
  year = {1972},
  doi = {10.1016/0019-1035(72)90004-8},
  url = {https://pubs.usgs.gov/publication/70010128},
  note = {Source identifier: 70010128}
}