John of Damascus on Islam. The "Heresy of the Ishmaelites." 2026-02-16T07:55:41+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - Sahas, Daniel J (Brill, 1972)