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Application filed by Die HenrifiledCriticalDie Henri
Priority to MC282ApriorityCriticalpatent/MC253A1/fr
Publication of MC253A1publicationCriticalpatent/MC253A1/fr
MC282A1960-12-131960-12-13Appareil portatif pour faciliter l'enseignement, en particulier, l'enseignement du vocabulaire d'une langue etrangere
MC253A1
(fr)