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- Penning, W.E. (author) doctoral thesis 2012
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- Penning, W.E. (author), Weerts, A.H. (author) report 2006
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- Penning, W.E. (author), Haasnoot, M. (author), Kuijper, M.W.M. (author), Buren, R. van. (author) report 2006
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- Lee, G.E.M. van der (author), Penning, W.E. (author), Duel, H. (author), Boogaard, H.F.P. van den (author) report 2003
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- Silvis, L.G. (author), Diermanse, F. (author), Penning, W.E. (author), Bakkum, R.C.J. (author), Gehrels, J.C. (author), Swierstra, W. (author) report 2003
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- Lee, G.E.M. van der (author), Geilen, N. (author), Duel, H. (author), Penning, W.E. (author) report 2002
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- Penning, W.E. (author) report 2002
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Duel, H. (author), Baptist, M.J. (author), Penning, W.E. (author)A new strategy based on floodplain measures for both flood risk management and enhancement of the biodiversity of the river Rhine.report 2001
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- Penning, W.E. (author) report 2001