Gibb, Hamilton A.R., Sir
Mohammedanism: an historical survey
Oxford University Press, 1949
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Spuler, Bertold
The muslim world : a historical survey
E.J. Brill, 1960
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An Historical atlas of Islam
edited by William C. Brice
E.J. Brill, 1981
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Virnon, Philip E.
Intelligence and cultural environment / Philip E. Vernon
Methuen & Co., 1972
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Bock, Philip K.
Continuities in Psychological anthropology/ Philip K. Bock
WH Freman, 1980
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