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Google圖書搜尋
Ecological Crop Geography
Karl Henry William Klages
出版
Macmillan
, 1942
URL
http://books.google.com.hk/books?id=ZwpJAAAAMAAJ&hl=&source=gbs_api
註釋
The social environment of crop plants. The physiological environment of crop plants. The ecological factors. The geographical distribution of crop plants.