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Kolstein, M.H. (author), de Back, J. (author) report 1981
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de Back, J. (author), Vaessen, G. (author) report 1978
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de Back, J. (author) report 1963
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Kolstein, M.H. (author), de Back, J. (author), den Boer, C. (author) report 1982
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de Back, J. (author), Vaessen, G. (author) report 1979
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van der Vegte, G.J. (author), de Back, J. (author), Wardenier, J. (author) report 1989
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de Back, J. (author) report 1958
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Bouwman, L.P. (author), de Back, J. (author) report 1963
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de Back, J. (author), den Boer, C. (author) report 1972
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van der Vegte, G.J. (author), de Back, J. (author), Wardenier, J. (author) report 1989
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Kolstein, M.H. (author), de Back, J. (author) report 1988
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de Back, J. (author) report 1965
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de Back, J. (author), Vaessen, G. (author) report 1979
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de Back, J. (author), Bouwman, L.P. (author) report 1962
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de Back, J. (author), Bouwman, L.P. (author) report 1960
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Kolstein, M.H. (author), de Back, J. (author) report 1989
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Verheul, A. (author), Wardenier, J. (author), de Back, J. (author) report 1990
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de Back, J. (author) report 1963
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de Back, J. (author), Bouwman, L.P. (author) report 1960
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de Back, J. (author), Bouwman, L.P. (author) report 1960