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The conservative illusion
Auerbach, M. Morton, (1959)
Estimating economic values of open space preservation : a comparison of dichotomous and trichotomous choice contingent valuation and transactions evidence
Loomis, John B., (2003)
Sustainable agricultural management contracts : using choice experiments to estimate the benefits of land preservation and conservation practices
Duke, Joshua M., (2012)
Wie er es sah
Roosevelt, Elliott, (1947)