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2. Heart of neolithic Orkney World Heritage Site;Atkins Heritage,2008
3. The Burra Charter;Australia ICOMOS,2000
4. Wind farms and landscape values: stage one final report: identifying issues;Australian Wind Energy Association and Australian Council of National Trusts,2005
5. Visual thresholds for detection. Recognition and visual impact in landscape settings;Bishop;J Environ Psychol,2000