Jenny Hill
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m17:49
Jenny Hill
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m17:49
+4
Jenny Hill
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m17:48
+8
Jenny Hill
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m17:48
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Jenny Hill
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m17:45
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Jenny Hill
Created page with " <ref>Arcement, G.J., Schneider, R. Guide for Selecting Manning's Roughness Coefficients for Natural Channels and Flood Plains U.S.G.S. WATER-SUPPLY PAPER 2339, 1989 http://..."
17:31
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