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Wardenier, J. (author), de Koning, C.H.M. (author), van Douwen, A.A. (author) report 1978
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Wardenier, J. (author), de Koning, C.H.M. (author), van Douwen, A.A. (author) report 1977
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van Douwen, A.A. (author) report 1976
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Wardenier, J. (author), de Koning, C.H.M. (author), van Douwen, A.A. (author) report 1976
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van Douwen, A.A. (author), Wardenier, J. (author) report 1975
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Strating, J. (author), van Douwen, A.A. (author), van 't Hullenaar, J.W. (author), Wagemans, L.A.G. (author) report 1971
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van Douwen, A.A. (author) report 1967
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Ligtenberg, F.K. (author), van Douwen, A.A. (author) report 1961
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van Douwen, A.A. (author), de Back, J. (author) report 1960
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Ligtenberg, F.K. (author), van Douwen, A.A. (author) report 1960