The-Valuation-of-Nature-An-Examination-of-Benefits-and-Costs-Associated-with-Duck-Nesting-Structures-and-the-Marginal-Duck-Recruit-Haagenson-Tessa The-Valuation-of-Nature-An-Examination-of-Benefits-and-Costs-Associated-with-Duck-Nesting-Structures-and-the-Marginal-Duck-Recruit-Haagenson-Tessa