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Dyfyniad Arddull ChicagoG P Moberg and J A Mench. THE Biology of Animal Stress: Basic Principles and Implications for Animal Welfare. CABI publishing, 2000.
Dyfyniad MLAG P Moberg and J A Mench. THE Biology of Animal Stress: Basic Principles and Implications for Animal Welfare. CABI publishing, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.