Intellectual development and school achievement of youths 12-17 years : demographic and socio-economic factors /
Guardado en:
Autor principal: | Hitchcok, Dale C. |
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Formato: | Libro |
Lenguaje: | Inglés |
Publicado: |
Washington :
U.S. Department of Health, Education, and Welfare,
1976.
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Materias: |
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