@misc{indiciaeb08499ea1d79,
  title = {The Lower Cretaceous Figuera Lava and Fajardo Formation in the stratigraphy of northeastern Puerto Rico},
  author = {Reginald Peter Briggs},
  year = {1973},
  doi = {10.3133/b1372g},
  url = {https://pubs.usgs.gov/publication/b1372G},
  note = {Source identifier: b1372G}
}