@misc{indiciae6c06e77fdff0,
  title = {Geologic Map of the Helen Planitia Quadrangle (V-52), Venus},
  author = {Ivan Lopez and Vicki L. Hansen},
  year = {2008},
  doi = {10.3133/sim3026},
  url = {https://pubs.usgs.gov/publication/sim3026},
  note = {Source identifier: sim3026}
}