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Gerrits, H.J. (author), Ellen, W. van (author), Rooij, N.M. de (author), Steenwijk, J.M. van (author) report 1995
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Gils, J.A.G. van (author), Ouboter, M.R.L. (author), Rooij, N.M. de (author) report 1992
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Ouboter, M.R.L. (author), Rooij, N.M. de (author), Gils, J.A.G. van (author) report 1991
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Gilding, B.H. (author), Kroot, M.P.J.M. (author), Wesseling, J.W. (author), Rooij, N.M. de (author), Streng, J. (author), Bril, J. (author), Postma, L. (author) report 1985
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Rooij, N.M. de (author) report 1982