Radio transmitter design 2026-02-15T21:12:53+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Kuznetsov, Boris; Shakhgildyan, Vagan V. (Mir, 1987)