ورقة تقويم وجداول فلكية من1804 — برلين

المصادر

1. Thomann, Johannes. (2021). The Institution of the Jalālī Calendar in 1079 CE and Its Cohabitation with the Older Persian Calendar. Calendars in the Making: The Origins of Calendars from the Roman Empire to the Later Middle Ages, edited by Sacha Stern; Leiden: Brill, chapter5, pp.210–244. , sec.5 fig.5.1

• Staatsbibliothek zu Berlin — Preußischer Kulturbesitz. (2013). Astronomische Tabellen, Ms. or. quart. 211. Staatsbibliothek zu Berlin, Orientalische Handschriften digital; PPN752162500, six leaves, Arabic; digitized2013.