A critical and comparative study of the spoken dialect of the ?arb tribe in Saudi Arabia. Doctoral dissertation, University of Leeds.; Nadwi, Abdullah Abbas. 1968. A study of the Arabic dialects of the Belad Ghamid and Zahran region of Saudi Arabia on the basis of original field recording and an examination of the relationship to the neighbouring regions. Doctoral dissertation, University of Leeds.; Schreiber, Giselher. 1970. Der arabische Dialekt von Mekka: Abriss der Grammatik mit Texten und Glossar. Doctoral dissertation, Westfälische Wilhelms-Universität zu Münster.; Sieny, Mahoud Esma'il. 1972. The Syntax of Urban Hijazi Arabic. Doctoral dissertation, Georgetown University.