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Google圖書搜尋
Survey of irrigation canal ecological parameters influencing aquatic weed growth
Norman E. Otto
出版
U.S. Department of the Interior, Bureau of Reclamation, Engineering and Research Center, Division of General Research
, 1976
URL
http://books.google.com.hk/books?id=v9TBMQEACAAJ&hl=&source=gbs_api