Kabeleh, Mohammad, Esmailpour Motlagh, Abolalghasem, شعبانی صمغ آبادی, رضا (2025). The Continuity of Various Types of Political Advice Letters in Iran (From the Sasanian Era to the Early Islamic Centuries). *Researches in Iranian History in Islamic Period*, 1(2), -. https://doi.org/10.82536/rihip.2024.1203262