Michael G. Morony (tr.): [The History of al-Tabarī.] Vol. xvm: Between civil wars: the caliphate of Mu'āwiyah A.D. 661–6801 A.H. 40–60. (Bibliotheca Persica.) xi. 261 pp. Albany, N.Y.: State University of New York Press, 1985. $24.50. - John Alden Williams (tr.): [The History of al-Tabarī] Vol. xxvi. The 'Abbāsid revolution A.D. 743–750/ A.H. 126–132. (Bibliotheca Persica.) xiv, 233 pp. Albany, N.Y.: State University of New York Press, 1985, $29.50. - George Saliba (tr.): [The History of al-Tabarī] Vol. xxxv: The crisis of the 'Abbāsid caliphate: the caliphates of al-Musta'īn and al-Mu'tazz A.D. 862-8691 AM. 248–255. (Bibliotheca Persica.) xii, 187 pp. Albany, N.Y.: State University of New York Press, 1985. $24.50. - Franz Rosenthal (tr.): [The History of al-Tabarī] Vol. xxxvrn. The return of the caliphate to Baghdad: the caliphates of al-Mu'tadid, al-Muktafī and al-Muqtadir, A.D. 892–915/A.H. 279–302. (Bibliotheca Persica.) Albany, N.Y.: State University of New York Press, 1985. $29.50.