Contingent valuation of nonmarket benefits in project economic analysis a guide to good practice حسب Sajise, Asa Jose, Samson, Jindra Nuella G., Quiao, Lotis, Sibal, Jasmin, Raitzer, David A., Harder, Dieldre

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Saving the Philippine eagle how much would it cost and are Filipinos willing to pay for it? حسب Harder, Dieldre S.