@misc{indiciae896a12572f40,
  title = {Geologic map of the Bayaney quadrangle, Puerto Rico},
  author = {A. E. Nelson and O. T. Tobisch},
  year = {1968},
  doi = {10.3133/i525},
  url = {https://pubs.usgs.gov/publication/i525},
  note = {Source identifier: i525}
}