@misc{indiciae8c24f72acadd,
  title = {Ground-water in the Teresina-Campo Maior area, Piaui, Brazil},
  author = {Harry G. Rodis and Edison F. Suszczynski},
  year = {1972},
  doi = {10.3133/wsp1663g},
  url = {https://pubs.usgs.gov/publication/wsp1663G},
  note = {Source identifier: wsp1663G}
}