The principles of electrical engineering and their application 2026-02-15T16:50:36+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Kapp, Gisbert, 1852-1922 (Methuen, Milton Keynes, Open University Press, 2011)