The age of the Caliphs 2026-02-15T23:52:37+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Spuler, Bertold, 1911- (The Muslim world, a historical survey ;, 1960)