[5]
Contingent Valuation: Controversies and Evidence[J] . Richard T. Carson,Nicholas E. Flores,Norman F. Meade.Environmental and Resource Economics . 2001 (2)
[5]
Contingent Valuation: Controversies and Evidence[J] . Richard T. Carson,Nicholas E. Flores,Norman F. Meade.Environmental and Resource Economics . 2001 (2)