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Google圖書搜尋
People Helping People
Gordon Stuart Smith
其他書名
50 Years of SCS Northeast Technical Center Conservation Efforts
出版
USDA, Soil Conservation Service, Northeast National Technical Center
, 1984
URL
http://books.google.com.hk/books?id=gY-VqxNZPIsC&hl=&source=gbs_api
EBook
FULL_PUBLIC_DOMAIN