Gwerthuso cynaliadwyedd cynlluniau datblygu unedol yng Nghymru : canllawiau ar arferion da = Sustainability appraisal of unitary development plans in Wales : a good practice guide.
Wales.Welsh Assembly Government.
Caerdydd : Cynulliad Cenedlaethol Cymru,
2002.
Teitl clawr = Cover title.
Regional planning
Sustainable development