A. N., H., and A.- qalebi A. A. “Isolation and Diagnosis of Providencia Rettgeri from Different Clinical Cases and Study”. Al-Qadisiyah Journal of Pure Science, Vol. 20, no. 4, July 2018, pp. 1 - 11, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/846.