Educational achievements of thirteen-year-olds in twelve countries : results of an international research project, 1959-61 /
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| 格式: | 图书 |
| 语言: | English |
| 出版: |
Hamburg :
UNESCO Institute for Education,
1962.
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| 丛编: | International studies in education (Hamburg, Germany) ;
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| 实物描述: | 68 p. |
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