Não informado. (1940). Water Resources Review. U.S. Department of the Interior, Geological Survey.
Chicago-Zitierstil (17. Ausg.)Não informado. Water Resources Review. Reston, Va: U.S. Department of the Interior, Geological Survey, 1940.
MLA-Zitierstil (8. Ausg.)Não informado. Water Resources Review. U.S. Department of the Interior, Geological Survey, 1940.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.