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1Cyhoeddwyd 2011Available for University of the Philippines Diliman via SpringerLink. Click here to access
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2Cyhoeddwyd 1998Visual Material
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4Cyhoeddwyd 1997Visual Material
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7Decentralization and local autonomy conditions for achieving sustainable natural resource managementCyhoeddwyd 1992Visual Material
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9Cyhoeddwyd 1984Visual Material
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