6Pearce D W, Turner R K. Economics of Natural Resources and Environment[ M]. Johns Hopkins University Press,1990.
7Goodsteinl E S. Economics and environment[ M]. 2nd edition. Prentice Hall. 1999.
8Hanley N. Shogren J F, White B. Environmental Economics in Theory and Practice[ M]. Oxford University Press, 1997.
9Lenonard Shabman, Kurt Stephenson. Environmental valuation and its economic critics [ J ]. Journal of Water Resource Planning and Management ,2000, 11 ( 12 ) :382.