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Dyfyniad Arddull ChicagoVallega, Adalberto. Sustainable Ocean Governance: A Geographical Perspective. London ; New York: Routledge, 2002.
Dyfyniad MLAVallega, Adalberto. Sustainable Ocean Governance: A Geographical Perspective. Routledge, 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.