Columbia subject headings:
Iran--History--640-1500.
Saffārid dynasty.
Yaʻqūb ibn al-Layth al-Ṣaffār, -879.
Harvard subject headings:
Iran--History--640-1500.
Saffarids.
Yaʻqūb ibn al-Layth al-Ṣaffār, -879
Princeton subject headings:
Iran--History--640-1500.
Saffārid dynasty.
Yaʻqūb Lays̲ Ṣaffār, d. 879.