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Google圖書搜尋
The Ploughing of Stony Land
P. S. Hutchinson
其他書名
A Comparison of Trailed Stump-jump and Conventional Mouldboard Ploughs
出版
National Institute of Agricultural Engineering
, 1953
URL
http://books.google.com.hk/books?id=Lw4WHQAACAAJ&hl=&source=gbs_api