@misc{indiciaeb814a9720aed,
  title = {Cretaceous and Tertiary rocks in the Corozal quadrangle, northern Puerto Rico},
  author = {Arthur E. Nelson},
  year = {1966},
  doi = {10.3133/b1244c},
  url = {https://pubs.usgs.gov/publication/b1244C},
  note = {Source identifier: b1244C}
}