@misc{indiciaedb37e3bc6252,
  title = {Marine geologic map of the Puerto Rico insular shelf, northwestern area, Rio Grande de Anasco to Rio Camuy},
  author = {K. A. Grove},
  year = {1982},
  doi = {10.3133/i1418},
  url = {https://pubs.usgs.gov/publication/i1418},
  note = {Source identifier: i1418}
}