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Soil Moisture
Charles Franklin Curtiss
Herbert Osborn
James Wilbur Wilson
Joseph Lancaster Budd
Julius Buel Weems
Louis Hermann Pammel
Millikan Stalker
出版
Experiment Station, Iowa Agricultural College
, 1895
URL
http://books.google.com.hk/books?id=wIpRAQAAMAAJ&hl=&source=gbs_api