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- Drewry Shipping Consultants (author) public lecture 1988
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- public lecture 1987
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- Gerritsma, J. (author) public lecture 1987
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- Spaans, Jack .A. (author) public lecture 1987
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- Beukelman, Wim (author) public lecture 1987
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- Saurwalt, K.J. (author) public lecture 1987
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- Meijer, M.C. (author) public lecture 1986
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- public lecture 1986
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- public lecture 1986
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- van Santen, J.A. (author) public lecture 1986
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- public lecture 1985
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- public lecture 1985
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- public lecture 1984
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- Hengst, S. (author) public lecture 1983
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- Nibbering, J.J.W. (author) public lecture 1983
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- public lecture 1982
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- van den Pol, Eduard (author) public lecture 1982
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- Spaans, Jack .A. (author) public lecture 1981
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- public lecture 1981
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- Spaans, J.A. (author) public lecture 1981