1. Cambay and the bead trade;Arkell;Antiquity,1936
2. The Portuguese in South-East Africa 1488–1600;Axelson,1973
3. Ibn Battuta, Travels in Asia and Africa;Battuta,1929
4. The Indian Ocean in Eurasian and African World-Systems before the sixteenth century;Beaujard;J. World Hist.,2005
5. Rhodesian beads from the 1929 excavations;Beck,1931