@misc{indiciae6fc73c86d087,
  title = {Observation on the hydrology of northeastern Brazil},
  author = {D.J. Cedarstrom and J.C. Assad},
  year = {1973},
  doi = {10.3133/ofr7344},
  url = {https://pubs.usgs.gov/publication/ofr7344},
  note = {Source identifier: ofr7344}
}