@misc{indiciae4550095c6238,
  title = {A geochemical reconnaissance of the Utuado Batholith and vicinity, Puerto Rico},
  author = {Robert E. Learned and T.H. Hickey and Ileana. Perez de Gonzales},
  year = {1981},
  doi = {10.3133/ofr811131},
  url = {https://pubs.usgs.gov/publication/ofr811131},
  note = {Source identifier: ofr811131}
}