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         Educational - acquisitional process in adult education / Mátyás Durkó . -- Debrecen : [ s . n . ] , 1982 . 237 p . "Studiex by the chair of adult and public education of the Lajos Kossuth University , Debrecen , Hungaray . "Adult education and culture . Acta Andragogiae et Culturae . Series" . ISBN 0209-9608