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Dyfyniad Arddull ChicagoAsian Development Bank and Joanna Elliott. Population Pressure and Natural Resource Management: Key Issues and Possible Actions. Manila: Asian Development Bank, 1991.
Dyfyniad MLAAsian Development Bank and Joanna Elliott. Population Pressure and Natural Resource Management: Key Issues and Possible Actions. Asian Development Bank, 1991.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.