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Google圖書搜尋
Analysis of Farm-mechanical Skills of Colorado Young Farmers with Implications for Course Building in Vocational Agriculture
Fred George Lechner
出版
Michigan State University of Agriculture and Applied Science. Department of Teacher Education
, 1958
URL
http://books.google.com.hk/books?id=_L1B1Z-OmSsC&hl=&source=gbs_api