@misc{indiciae5ae98fe0af2c,
  title = {Marine geologic map of the Puerto Rico insular shelf Guanica to Ponce area},
  author = {Juan L. Trias},
  year = {1991},
  doi = {10.3133/i2263},
  url = {https://pubs.usgs.gov/publication/i2263},
  note = {Source identifier: i2263}
}