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Dyfyniad Arddull ChicagoSubade, Rodelio Fernandez. Valuing Biodiversity Conservation in a World Heritage Site: Citizens' Non-use Values for Tubbataha Reefs National Marine Park, Philippines. Singapore: Economy and Environment Program for Southeast Asia, 2005.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.