Elawi, S. A., and M. E. Mohammad. “The Contributions of Dhimmis in the East Till Th End of the Third Century A.H ( The Exchange and Moneychnger As a Sample )”. Journal of Tikrit University for Humanities, vol. 26, no. 3, June 2019, pp. 312-27, doi:10.25130/jtuh.26.3.2019.16.