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ISSN:0022-1201|87|11|34-38

Society of American Foresters‎(1989)‎

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By Portney Paul R.   Parry Ian W.H.   Gruenspecht Howard K.   Harrington Winston   in The Journal of Economic Perspectives

ISSN:0895-3309|17|4|203-217

American Economic Association‎(2003)‎

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