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Asselman, N.E.M. (author), Coen, L. (author), Diermanse, F.L.M. (author), Groeneweg, J. (author), Jeuken, M.C.J.L. (author), Pereira, F. (author), Sperna Weiland, F.C. (author), Vanlede, J. (author), Viaene, P. (author) report 2007
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Beek, J.K.L. van (author), Ouboter, M.R.L. (author), Boderie, P.M.A. (author), Koeze, R.D. (author) report 1992
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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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Zschuppe, K.H. (author) report 1975