發送短信 : Better than their reputation: Enhancing the validity of contingent valuation mail survey results through citizen expert groups

 _    _      ___      _____    __   __            
| || | ||   / _ \\   / ____||  \ \\/ //     ___   
| || | ||  | / \ || / //---`'   \ ` //     /   || 
| \\_/ ||  | \_/ || \ \\___      | ||     | [] || 
 \____//    \___//   \_____||    |_||      \__ || 
  `---`     `---`     `----`     `-`'       -|_|| 
                                             `-`