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Physical and Mathematical Theories of Tile and Ditch Drainage and Their Usefulness in Design
Jan Van SchilfgaardeDon KirkhamIowa State College. Agricultural and Home Economics Experiment StationRichard K. Frevert
出版Agricultural Experiment Station, Iowa State College, 1956
URLhttp://books.google.com.hk/books?id=0nOtKCrYsXwC&hl=&source=gbs_api
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