@misc{indiciae8a0834777602,
  title = {Geology of the Ciales quadrangle, Puerto Rico},
  author = {H. L. Berryhill},
  year = {1965},
  doi = {10.3133/b1184},
  url = {https://pubs.usgs.gov/publication/b1184},
  note = {Source identifier: b1184}
}