Geometric concepts in Islamic art 2026-02-15T19:06:07+03:00 DEBUG: VuFind\ILS\Driver\Folio: Token taken from global cache: eyJhbGciOiJIUzI1NiJ9.eyJzdWIiO... - El-Said, Issam; Parman, Ayse (World of Islam Festival Publishing Company Ltd, 1976)