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1圖書出版 1977“...Commission of the European Communities. Directorate-General for Research, Science and Education...”
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2圖書由 Bongaerts, J. C.“...Commission of the European Communities. Directorate-General for Research, Science and Education...”
出版 1992
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3圖書出版 1980“...Commission of the European Communities. Directorate-General for Research, Science and Education...”
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4圖書出版 1995“...Commission of the European Communities. Directorate-General for Research, Science and Education...”
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5Conference Proceeding 圖書出版 1980“...Commission of the European Communities. Directorate-General for Research, Science and Education...”
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6圖書出版 1977“...Commission of the European Communities. Directorate-General for Research, Science and Education...”