Symbolic logic 2026-02-16T04:19:49+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Lewis, Clarence Irving, 1883-; Langford, Cooper Harold, 1895- (Dover Publications, 1959)