Economic impacts of the green industry in the United States ; final report to the National Urban and Community Forestry Advisory Committee 著者： Charles R Hall; John J Haydu; Alan W Hodges; National Urban and Community Forest Advisory Council (U.S.) 类型：  图书 : 州政府或者省政府刊物 出版商： Knoxville, Tenn. : University of Tennessee, Extension Service, 2005.

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