Title: Ṭabaqāt-i ijtimāʻī dar tārīkh-i Bayhaqī
Subjects: Social classes, History, Ghaznevids
Places: Afghanistan, Iran
People: Abū al-Faz̤l Muḥammad ibn Ḥusayn Bayhaqī (approximately 996-1077)
Time periods: 640-1256