|Philby,The background of Islam: Being a sketch of Arabian history in pre-Islamic timesWhitehead Morris Alexandira, Egypt ; 1st edition January 1 1947 p||There is no direct mention in south Arabian inscriptions of the Roman expedition, a completely exceptional occurrence for a country that had never seen enemy troops on its soi• Beeston Some Observations on Greek and Latin Data Relating to South Arabia in Bulletin of the School of Oriental and African Studies, University of London, Vol|
|Albert Jamme,inscription from Mahram Biqlis p||Other news of which Strabo was also the source, typical of the Romans' opinion of their own cultural superiority appears on the curious systems of how south Arabia's regal power was transferred and on its inhabitants' unorthodox sexual habits|
Le Museon, 3-4, 1953, P.
|Sharaffadin 42, Le Museon, 3-4, 1967, Pp||Strabo described the custom in south Arabia which permitted women to have many husbands provided they were all brothers|
|Conti Rossini, Carlo, Chrestomathia Arabica meridionalis epigraphica edita et glossario instructa 1931 Pubblicazioni dell'Instituto per l'Oriente p|
John Philby Background of Islam p.