19 - Philby, (H.St. J.B.), South Arabian 'Chronology, le Museon, LXII, 1949.

20 - Philby, (H.St. J.B.), The Land of Sheba, GJ, 92, 1938.

21 - Philby, (J.B.), and Tritton, (A.S.), Najran Inscriptions, JRAS,. 1944.

22 - Ryckrnans, (G.), Inscriptions Sud - Arabes, le Museon, XII, 1942.

23 - Ryckrnans, (G.), on Some Problems of South Arabian Epigra phy, BSOAS, 1952.

24 - Ryckrnans, (J.), Aspects Mouuveaux du Problerne Tharnou deens, Studia Islamica, S, 1956.

25 - Smith, (S.), Events in Arabia in the 6 th Century A.O., BSOAS, 1954.

26 - Tarn (W.W.), Ptolemy II and Arabia, in JEA, IS, 1929.