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Gerritsma, J. (author)
journal article 1991
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Gerritsma, J. (author)
journal article 1986
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Gerritsma, J. (author)
journal article 1986
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Gerritsma, J. (author)
journal article 1985
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Gerritsma, J. (author)
journal article 1985
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Gerritsma, J. (author), Keuning, J.A. (author)
journal article 1985
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Gerritsma, J. (author)
journal article 1985
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Gerritsma, J. (author)
journal article 1984
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Gerritsma, J. (author)
journal article 1984
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Gerritsma, J. (author)
journal article 1983
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Beukelman, W. (author), Gerritsma, J. (author)
journal article 1982
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Keuning, Lex J.A. (author), Gerritsma, J. (author)
journal article 1982
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Gerritsma, J. (author)
journal article 1982
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Gerritsma, J. (author)
journal article 1982
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Gerritsma, J. (author)
journal article 1981
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Gerritsma, J. (author)
journal article 1981
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Gerritsma, J. (author)
journal article 1980
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Gerritsma, J. (author)
journal article 1980
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Gerritsma, J. (author)
journal article 1980
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Gerritsma, J. (author)
journal article 1978
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