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- Wittenberg, T.C. (author) report 1999
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- Wittenberg, H. (author) report 1993
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Zandbergen, B.T.C. (author), Wijchers, T. (author), Elands, P.J.M. (author), de Wilde, J.P. (author), Dijkstra, F. (author) report 1990
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- Wittenberg, H. (author) report 1990
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Zandbergen, B.T.C. (author), Wijchers, T. (author), Elands, P.J.M. (author), de Wilde, J.P. (author), Dijkstra, F. (author) report 1990
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Zandbergen, B.T.C. (author), Wijchers, T. (author), Elands, P.J.M. (author), de Wilde, J.P. (author), Dijkstra, F. (author) report 1989
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Zandbergen, B.T.C. (author), Wijchers, T. (author), Elands, P.J.M. (author), de Wilde, J.P. (author), Dijkstra, F. (author) report 1989
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Zandbergen, B.T.C. (author), Wijchers, T. (author), Elands, P.J.M. (author), de Wilde, J.P. (author), Dijkstra, F. (author) report 1988
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Zandbergen, B.T.C. (author), Wijchers, T. (author), Elands, P.J.M. (author), de Wilde, J.P. (author), Dijkstra, F. (author) report 1988
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), van der Geld, C.W.M. (author), Vos, J.B. (author), Wijchers, T. (author), Elands, P.J.M. (author), Klein Lebbink, G. (author), van der Berg, R.P. (author) report 1987
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Wijchers, T. (author), Elands, P.J.M. (author), Dijkstra, F. (author), van den Berg, R.P. (author), van den Brand, J. (author) report 1987
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- Wittenberg, H. (author) report 1987
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), van der Geld, C.W.M. (author), Vos, J.B. (author), Wijchers, T. (author), van de Berg, R.P. (author) report 1986
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), van der Geld, C.W.M. (author), Vos, J.B. (author), Wijchers, T. (author), van de Berg, R. (author), van Dijk, J.H. (author) report 1986
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Vos, J.B. (author), Versmissen, J.P.M. (author), Wijchers, T. (author), van Dijk, J.H. (author) report 1985
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- Wittenberg, H. (author), Korting, P.A.O.G. (author) report 1985
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- Wittenberg, H. (author), Korting, P.A.O.G. (author), Vos, J.B. (author), Versmissen, J.P.M. (author), Wijchers, T. (author), van Dijk, J.H. (author) report 1985
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- Wittenberg, H. (author) report 1984
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- Wittenberg, H. (author) report 1983
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- Wittenberg, H. (author) report 1979