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Plant Association and Management Guide for the Ponderosa Pine, Douglas-fir, and Grand Fir Zones
Christopher TopikNancy M. HalversonTom High
其他書名
Mount Hood National Forest
出版U.S. Department of Agriculture, Forest Service, Pacific Northwest Region, 1988
URLhttp://books.google.com.hk/books?id=N3ruTfxOnFwC&hl=&source=gbs_api
EBookFULL_PUBLIC_DOMAIN