@misc{indiciae4ccc76200bce,
  title = {Mars - Crustal structure inferred from Bouguer gravity anomalies.},
  author = {Phillips, R. J. and Saunders, R. S. and Conel, J. E.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730054908},
  note = {Source identifier: 19730054908}
}