@misc{indiciae6fca36e8cce1,
  title = {Chemical composition of Mars},
  author = {J. W. Morgan and E. Anders},
  year = {1979},
  doi = {10.1016/0016-7037(79)90180-7},
  url = {https://pubs.usgs.gov/publication/70012478},
  note = {Source identifier: 70012478}
}