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Dyfyniad Arddull ChicagoPatin, S. A. Pollution and Biological Resources of the Ocean. London: Butterworth, 1982.
Dyfyniad MLAPatin, S. A. Pollution and Biological Resources of the Ocean. Butterworth, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.