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Dyfyniad Arddull ChicagoFAO. Integrated Planning for Sustainable Management of Land Resources: Basic Documents, Case Studies, Working Papers, Workshop Proceedings and Other Related Publications. 1999.
Dyfyniad MLAFAO. Integrated Planning for Sustainable Management of Land Resources: Basic Documents, Case Studies, Working Papers, Workshop Proceedings and Other Related Publications. 1999.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.