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Dyfyniad Arddull ChicagoBerry, G. N. Australian Journal of Zoology. Australia: An Australian Journal of Scientific Research, 1988.
Dyfyniad MLABerry, G. N. Australian Journal of Zoology. Australia: An Australian Journal of Scientific Research, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.