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Using citizen expert groups in environmental valuation : lessons from a CVM study in Northern Thailand
Ahlheim, Michael; Frör, Oliver; Ekasingh, Benchaphun; … - 2007
Persistent link: https://www.econbiz.de/10013439554
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Better than their reputation : a case for mail surveys in contingent valuation
Ahlheim, Michael; Ekasingh, Benchaphun; Frör, Oliver; … - 2008
Persistent link: https://www.econbiz.de/10013439644