@misc{indiciaea96620ca2981,
  title = {Summer season variability of the north residual cap of Mars as observed by the Mars Global Surveyor Thermal Emission Spectrometer (MGS-TES)},
  author = {Wendy M. Calvin and Timothy N. Titus},
  year = {2008},
  doi = {10.1016/j.pss.2007.08.005},
  url = {https://pubs.usgs.gov/publication/70033421},
  note = {Source identifier: 70033421}
}