Não informado. (1940). Water Resources Review. U.S. Department of the Interior, Geological Survey.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Water Resources Review. Reston, Va: U.S. Department of the Interior, Geological Survey, 1940.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Water Resources Review. U.S. Department of the Interior, Geological Survey, 1940.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.