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Dyfyniad Arddull ChicagoShukla, S. P. Planet Protection: Biodiversity, Conservation, Environmental Education and Degradation and Socio- Economic Development. New Delhi: Mittal Publications, 1997.
Dyfyniad MLAShukla, S. P. Planet Protection: Biodiversity, Conservation, Environmental Education and Degradation and Socio- Economic Development. Mittal Publications, 1997.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.