Min tārīkh al-Yaman al-ḥadīth, 1517-1840 - Biṭrīq, ʻAbd al-Ḥamīd, (Jāmiʻat al-Duwal al-ʻArabīyah, Maʻhad al-Buḥūth wa-al-Dirāsāt al-ʻArabīyah, 1969)