Halm, Heinz, 1942- The Fatimids and their traditions of learning / Heinz Halm. - London ; New York : I.B. Tauris in association with the Institute of Ismaili Studies, c1997. (rep. 2001) - xv, 112 p. ; 23 cm. - Ismaili heritage series ; v.2 . ISBN: 1860643132 (pbk.) Subjects--Topical Terms: Fatimites.Egypt --History --640-1250. Subjects--Geographic Terms: Africa, North --History --647-1517.