Qahtan, studies in old South Arabian epigraphy - Beeston, A. F. L. (Luzac, 1959)
fasc. 1. The mercantile code of Qataban–fasc. 2. The Labakh texts (with addenda to "The Mercantile code of Qataban")–fasc. 3. Warfare in ancient South Arabia (2nd. - 3rd. centuries A.D.)