@misc{indiciaec9b4fe912ad0,
  title = {Preliminary geologic map of the Patillas and Guayama quadrangles, Puerto Rico},
  author = {Lynn Glover},
  year = {1982},
  doi = {10.3133/ofr821097},
  url = {https://pubs.usgs.gov/publication/ofr821097},
  note = {Source identifier: ofr821097}
}