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Google圖書搜尋
Paper Mulch for the Vegetable Garden
其他書名
Its Effect on Plant Growth and on Soil Moisture, Nitrates, and Temperature. 1929-1930
出版
Ohio Agricultural Experiment Station
, 1930
URL
http://books.google.com.hk/books?id=MTYdjgEACAAJ&hl=&source=gbs_api