N AL-YOUSIFANI, N. and M NAYEF, M. 2002. Dental discoloration prevalence of rural and urban population in Ninevah Governorate, Mosul, Iraq. A comparative study. Al-Rafidain Dental Journal. 2, 3 (Dec. 2002), 369–374. DOI:https://doi.org/10.33899/rden.2002.166448.