Foundations for a theory of instruction and educational psychology 2026-02-15T14:50:53+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Patterson, C. H. (Cecil Holden), 1912 (Harper & Row, 1977)