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Application filed by Wyzsza Szkola PedagogfiledCriticalWyzsza Szkola Pedagog
Priority to PL29723292ApriorityCriticalpatent/PL167956B1/en
Publication of PL297232A1publicationCriticalpatent/PL297232A1/en
Publication of PL167956B1publicationCriticalpatent/PL167956B1/en