@misc{indiciae97b73b73a9ee,
  title = {Hydrologic Unit Map -- 1974, Caribbean region},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1974},
  doi = {10.3133/hu58},
  url = {https://pubs.usgs.gov/publication/hu58},
  note = {Source identifier: hu58}
}