Exploring power technology : basic fundamentals 2026-02-16T02:13:24+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Walker, John R., 1924- (Goodheart-Willcox Co., 1976)