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Gerritsma, J. (author) book 1986
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Gerritsma, J. (author) conference paper 1970
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Gerritsma, J. (author) conference paper 1973
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Gerritsma, J. (author), Beukelman, W. (author) conference paper 1966
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Gerritsma, J. (author) conference paper 1981
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Gerritsma, J. (author) conference paper 1981
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Gerritsma, J. (author) conference paper 1966
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Gerritsma, J. (author), Beukelman, W. (author) conference paper 1964
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Gerritsma, J. (author) conference paper 1957
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Gerritsma, J. (author) conference paper 1985
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Gerritsma, J. (author) conference paper 1954
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Gerritsma, J. (author) conference paper 1992
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Gerritsma, J. (author) conference paper 1974
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Beukelman, W. (author), Gerritsma, J. (author) conference paper 1983
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Gerritsma, J. (author) conference paper 1975
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Gerritsma, J. (author), Beukelman, W. (author) conference paper 1964
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Gerritsma, J. (author), Keuning, J.A. (author), Versluis, A. (author) conference paper 1992
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Gerritsma, J. (author) conference paper 1987
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Gerritsma, J. (author) conference paper 1971
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de Bruijn, Roger (author), Huijs, Fons (author), Bunnik, Tim (author), Huijsmans, Rene (author), Gerritsma, Marc (author) conference paper 2011