@misc{indiciaec8299211015a,
  title = {Geological terrain models},
  author = {Kaupp, V. H. and Macdonald, H. C. and Waite, W. P.},
  year = {1981},
  url = {https://ntrs.nasa.gov/citations/19830028862},
  note = {Source identifier: 19830028862}
}