@misc{indiciae3a2a12b6e9d1,
  title = {Water-resources investigations in Puerto Rico and the U.S. Virgin Islands, 1986-1988},
  author = {J.W. Troester},
  year = {1990},
  doi = {10.3133/ofr90122},
  url = {https://pubs.usgs.gov/publication/ofr90122},
  note = {Source identifier: ofr90122}
}