Clarence-Smith, W. (1997). Hadhramaut and the Hadhrami diaspora in the modern colonial era: an introductory survey [and] The economic role of the Hadhrami diaspora in the Red Sea and the Gulf of Aden [and] Hadhrami entrepreneurs in the Malay world c 1740-1940. In U. Freitag, & W. Clarence-Smith (Eds.), Hadhrami traders scholars and statesmen in the Indian Ocean 1750s to 1960s. E J Brill