Educational achievements of thirteen-year-olds in twelve countries : results of an international research project, 1959-61 /
Salvato in:
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| Natura: | Libro |
| Lingua: | English |
| Pubblicazione: |
Hamburg :
UNESCO Institute for Education,
1962.
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| Serie: | International studies in education (Hamburg, Germany) ;
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| Soggetti: |
| Descrizione fisica: | 68 p. |
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