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- De Jong, G.W. (author) doctoral thesis 1994
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- De Jong, A.F. (author) doctoral thesis 1990
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- De Jong, Th. (author) doctoral thesis 1987
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De Jong, B.A. (author)Summary in Dutchdoctoral thesis 1983
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- De Jong, T.M. (author) doctoral thesis 1978
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- De Jong, G. (author) doctoral thesis 1973
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- De Jong, B. (author) doctoral thesis 1970
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- De Jong, J. (author) doctoral thesis 1970
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- De Jong, H.C.J. (author) doctoral thesis 1953
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- De Jong, J. (author) doctoral thesis 1952
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- De Jong, J.R. (author) doctoral thesis 1951
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- De Jong, W. (author) doctoral thesis 1928
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