Search for: [References = %2234. VAN BEUKERING P.J.H.%2C CESAR H.S.J.%2C JANSSEN M.A.%2C 2003. Economic valuation of the Leuser National Park on Sumatra%2C Indonesia. Ecological Economics%2C vol. 44%2C iss. 1%2C pp. 43%5C-62.%22]

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