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Dyfyniad Arddull ChicagoKostianoy, Andrey G., and Aleksey N. Kosarev. The Caspian Sea Environment. Berlin, Heidelberg: Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b138238.
Dyfyniad MLAKostianoy, Andrey G., and Aleksey N. Kosarev. The Caspian Sea Environment. Springer Berlin Heidelberg, 2005. https://doi.org/10.1007/b138238.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.