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- Walstra, D.J.R. (author) report 2008
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- Van de Graaff, J. (author), Boers, M. (author), Diermanse, F.L.M. (author), Walstra, D.J. (author), Steetzel, H.J. (author) report 2007
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- Walstra, D.J.R. (author), Cohen, A.B. (author), Aarninkhof, S.G.J. (author), Koningsveld, M. van (author) report 2006
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- Walstra, D.J.R. (author), Koster, L. (author) report 2006
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- Walstra, D.J.R. (author) report 2005
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- Walstra, D.J.R. (author), Ormondt, M. van (author), Roelvink, J.A. (author) report 2004
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- Rijn, L.C. van (author), Walstra, D.J.R. (author), Ormondt, M. van. (author) report 2004
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- Rijn, L.C. van (author), Walstra, D.J.R. (author) report 2004
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- Rijn, L.C. van (author), Walstra, D.J.R. (author) report 2004
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- Walstra, D.J.R. (author) report 2004
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- Walstra, D.J.R. (author), Steetzel, H.J. (author) report 2003
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- Walstra, D.J.R. (author), Helvert, M.A.G. van (author) report 2003
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- Rijn, L.C. van (author), Walstra, D.J.R. (author) report 2003
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- Rijn, L.C. van (author), Walstra, D.J.R. (author), Boer, G. de (author) report 2002
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- Rijn, L.C. van (author), Walstra, D.J.R. (author), Helvert, M.A.G. van (author) report 2002
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- Walstra, D.J.R. (author) report 2001
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- Walstra, D.J.R. (author), Koningsveld, M. van (author), Aarninkhof, S.G.J. (author), Ruessink, B.G. (author) report 2001
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- Walstra, D.J.R. (author) report 2001
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Van Rijn, L.C. (author), Walstra, D.J. (author), Van Helvert, M.A.G. (author), De Boer, G. (author)For several years the large-scale mining of sand from the Dutch Sector of the North sea is in discussion related to the need of sand for shoreface, beach and dune nourishment and large-scale engineering works at sea (Maasvlakte extension, airport at sea). The mining methods considered, basically fall into two categories: wide, shallow or small,...report 2001
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- Eysink, W.D. (author), Walstra, D.J.R. (author), Stive, M.J.F. (author) report 2001
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