@misc{indiciae9a2ad2f56c96,
  title = {Characterization of Mars' seasonal caps using neutron spectroscopy},
  author = {T.H. Prettyman and W. C. Feldman and T.N. Titus},
  year = {2009},
  doi = {10.1029/2008je003275},
  url = {https://pubs.usgs.gov/publication/70036086},
  note = {Source identifier: 70036086}
}