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Dyfyniad Arddull ChicagoWilkinson, Lise. Animals and Disease: An Introduction to the History of Comparative Medicine. Cambridge: Cambridge University Press, 1992.
Dyfyniad MLAWilkinson, Lise. Animals and Disease: An Introduction to the History of Comparative Medicine. Cambridge: Cambridge University Press, 1992.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.