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IntroductionForesaw is importsnt part of national economy, notonly an industry but also a public welfare. Forestresource has ecological, economical and socialb6nedtS. At present, the study about forest ecologicalbenefit is mainly on measurement of physical quanhty, and less on measurement of economical quantity(Bat6man 1991, DWyer et al. 1992.) (how to transformphysical quantity to economical quantity). There existmany problems on research of measurement of forestecological benefitS. For ex… 相似文献
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