@misc{indiciae1eb8ace0f1e6,
  title = {Reconnaissance investigations of the discharge and water quality of the Amazon River},
  author = {Roy Edwin Oltman},
  year = {1968},
  doi = {10.3133/cir552},
  url = {https://pubs.usgs.gov/publication/cir552},
  note = {Source identifier: cir552}
}