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Google圖書搜尋
Effect of Seasonal Conditions and Soil Treatment on Bacteria and Molds in Soil
Percy Edgar Brown
William Vernal Halversen
出版
Agricultural Experiment Station, Iowa State College of Agriculture and Mechanic Arts
, 1919
URL
http://books.google.com.hk/books?id=yIQkAQAAMAAJ&hl=&source=gbs_api