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Dyfyniad Arddull ChicagoCrease, J., and W J Sanders Gould. Progress in Oceanography. Oxford: Pergamon Press, 1985.
Dyfyniad MLACrease, J., and W J Sanders Gould. Progress in Oceanography. Pergamon Press, 1985.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.