@misc{indiciae6681b8ed9f1c,
  title = {Planetary Interactive GIS-on-the-Web Analyzable Database (PIGWAD)},
  author = {Trent M. Hare and Kenneth L. Tanaka},
  year = {2001},
  url = {https://pubs.usgs.gov/publication/70201978},
  note = {Source identifier: 70201978}
}