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Dyfyniad Arddull ChicagoHaas, Timothy. Improving Natural Resource Management: Ecological and Political Models. Chichester, West Sussex: John Wiley & Sons Inc., 2011.
Dyfyniad MLAHaas, Timothy. Improving Natural Resource Management: Ecological and Political Models. John Wiley & Sons Inc., 2011.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.