6Perrot-Maitre D,Davis P. Case Studies of Markets and Innovative Financial Mechanisms for Water Services from Forest[EB/OL].http://www.forest-rends.org/resources/publications/publications.php?datepub=0&theme=1 &lang=1,. 被引量:1
7Smith G A,Christensen R C. Suggestions to Instructors on Policy Formulation[M].Chicago:Richard D Irwin,1951.3-4. 被引量:1