@misc{indiciae887f2744a6e2,
  title = {Geologic map of the Monte Guilarte Quadrangle, Puerto Rico},
  author = {R.D. Krushensky and A.F. Curet},
  year = {1984},
  doi = {10.3133/i1556},
  url = {https://pubs.usgs.gov/publication/i1556},
  note = {Source identifier: i1556}
}