Educational achievements of thirteen-year-olds in twelve countries : results of an international research project, 1959-61 /
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| Main Author: | |
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| Format: | Book |
| Language: | English |
| Published: |
Hamburg :
UNESCO Institute for Education,
1962.
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| Series: | International studies in education (Hamburg, Germany) ;
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| Physical Description: | 68 p. |
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