Abdul-Razzak, S. (1997). International Boundaries of Saudi Arabia. p. 32. ISBN 978-8172000004. Michael Rice, op cit. Michael Rice. Op cit. Michael Rice: The Archaeology...
International Boundaries of Saudi Arabia. Galaxy Publications. p. 32. ISBN 978-8172000004. Abdullah I of Jordan; Philip Perceval Graves (1950). Memoirs. p. 186...
Abdul-Razzak, S. (1997). International Boundaries of Saudi Arabia. p. 32. ISBN 978-8172000004. Abdullah I of Jordan; Philip Perceval Graves (1950). Memoirs. p. 186...