Todd et al, Iraq Tribal Study – Al-Anbar Governorate: The Albu Fahd Tribe, The Albu Mahal Tribe and the Albu Issa Tribe (2006, recently released by DoD), via Pat Lang's blog here.

Based on an examination of the identity and history of Iraq’s tribes and attempts to influence them; case studies of influence of other Middle East tribes; and an analysis of a wide range of counter insurgencies, a number of insights on influencing Iraq’s tribes have emerged. These insights are key to successful tribal engagement and influence operations aimed at the Sunni Arab tribes of al-Anbar Governorate...