@misc{indiciae347fdb4ca33a,
  title = {Use of surface-geophysical techniques for ground-water exploration in the Canovanas-Rio Grande area, Puerto Rico},
  author = {Arturo Torres-Gonzalez},
  year = {1985},
  doi = {10.3133/wri834266},
  url = {https://pubs.usgs.gov/publication/wri834266},
  note = {Source identifier: wri834266}
}