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Principles of Gully Erosion in the Piedmont of South Carolina
Hubert Andrew IrelandDolan Hoyle EargleCharles Farquharson Stewart Sharpe
出版U.S. Department of Agriculture, 1939
URLhttp://books.google.com.hk/books?id=6VQEhyheeXcC&hl=&source=gbs_api
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