Society, National Geographic (1 Jul 2019). "Ocean Currents". National Geographic Society (بالإنجليزية). Archived from the original on 2021-11-20. Retrieved 2020-10-16.
Society, National Geographic (1 Jul 2019). "Ocean Currents". National Geographic Society (بالإنجليزية). Archived from the original on 2021-11-20. Retrieved 2020-10-16.