Utvärdering genom uppföljning
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下载链接：
https://b2find.eudat.eu/dataset/5dda5494-34c8-5658-831d-b6da7444dd98
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资源简介：
The first cohort comprises a nationally representative sample of pupils consisting of those born on the 5th, 15th or 25th of any month in 1948. The material covers some 12 000...
