@misc{indiciae9490056ceb8c,
  title = {Shoreline features and Quaternary shoreline changes, Puerto Rico},
  author = {C. A. Kaye},
  year = {1959},
  doi = {10.3133/pp317b},
  url = {https://pubs.usgs.gov/publication/pp317B},
  note = {Source identifier: pp317B}
}