@misc{indiciae4e3f20e2229c,
  title = {Concepcion and Palma Escrita Formations, western Puerto Rico},
  author = {David H. McIntyre},
  year = {1974},
  doi = {10.3133/b1394d},
  url = {https://pubs.usgs.gov/publication/b1394D},
  note = {Source identifier: b1394D}
}