@misc{indiciaec749c6d16c4b,
  title = {The U.S. Geological Survey Marine Geology Program in Puerto Rico},
  author = {Rafael W. Rodriguez and William C. Schwab and Bruce R. Richmond and William P. Dillon},
  year = {1993},
  doi = {10.3133/ofr93580},
  url = {https://pubs.usgs.gov/publication/ofr93580},
  note = {Source identifier: ofr93580}
}