Kharīṭat al-ʻālam allatī ṣanaʻahā jughrāfīyū al-Khalīfah al-Maʼmūn (ḥakama min 198 H-218 H) = World map of the geographers of the Caliph Al-Maʼmūn (reigned 813-833 A.D.)
Map, Arabic, [1990?]
Institut für Geschichte der Arabisch-Islamischen Wissenschaften, Frankfurt am Main, [1990?]