@misc{indiciae6f01c7c3aa25,
  title = {Preliminary geologic map of Ellipse III-11-8 and vicinity},
  author = {Mareta West and P. Jan Cannon},
  year = {1967},
  doi = {10.3133/ofr68321},
  url = {https://pubs.usgs.gov/publication/ofr68321},
  note = {Source identifier: ofr68321}
}