@misc{indiciaea857564617a7,
  title = {Outline for a hydrologic data base for Portugal},
  author = {Norman E. Hutchison},
  year = {1981},
  doi = {10.3133/ofr81424},
  url = {https://pubs.usgs.gov/publication/ofr81424},
  note = {Source identifier: ofr81424}
}