@misc{indiciaefb99d7a2dda1,
  title = {Bibliography of geology and geography of Ecuador},
  author = {Roger B. Colton},
  year = {1968},
  doi = {10.3133/ofr6862},
  url = {https://pubs.usgs.gov/publication/ofr6862},
  note = {Source identifier: ofr6862}
}