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XXV Conference internationale de l'instruction publique.
Published 1962Subjects:Conference Proceeding Book -
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XXVI Conference internationale de l'instruction publique.
Published 1963Subjects:Conference Proceeding Book -
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Recomendaciones 1934-1968.
Published 1970Subjects: “…CONFERENCIAS INTERNACIONALES…”
Conference Proceeding Book -
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L'enseignement des mathematiques dans les ecoles secondaires.
Published 1956Subjects:Conference Proceeding Book -
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Music in education : international conference on the role and place of music in the education of youth and adults Brussels, 29 june to 9 july 1953.
Published 1956Subjects:Conference Proceeding Book