Problems in electrical engineering, 2026-02-15T15:39:09+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Lyon, Waldo Vinton, 1881- (Methuen, Milton Keynes, Open University Press, 1908)