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Gerritsma, J. (author) report 1975
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van Leeuwen, Ger (author) report 1973
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de Jong, Bart (author) report 1973
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Yourkov, N. (author) report 1971
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Moeyes, G. (author) report 1971
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Gerritsma, J. (author) report 1971
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Lin, Jung-Tai (author) report 1971
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Ashton, Georg D. (author) report 1970
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Nijeholt, C.A.M. (author) report 1970
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Tyson, Ensign C. Graham (author) report
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Moeyes, G. (author) report
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Glansdorp, C.C. (author) report 1969
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van Leeuwen, Ger (author) report 1969
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Glansdorp, C.C. (author) report 1969
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Gerritsma, J. (author) report 1969
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van Leeuwen, Ger (author) report 1969
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Glansdorp, C.C. (author), Buitenhek, M. (author) report 1969
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Vugts, Jan H. (author) report 1968
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van den Bosch, J.J. (author), Vugts, J.H. (author) report 1967
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Vugts, Jan H. (author) report 1967