Tarikh al-Yaman Siyasiyyan wa I'lamiyyan min Khilal al-Nuqud al-Arabiyya al-Islamiyya li al-Fatra ma bayna al-Qarnayn al-Thalith wa al-Tasi al-Hijriyyayn, 9th–15th Centuries CE (The Political and Media History of Yemen through Arab Islamic Coins, Third to Ninth Centuries AH, 9th–15th Centuries CE)