Mohammed, H. J., 		Hassan, D.S., AND 		Hmood, A..
" Spectrophotometric Determination of Nirite By The Diazotization  Coupling With  Aniline and 4,6 Dihydroxy-2 Mercaptopyrimidine" <em>Ibn AL- Haitham Journal For Pure and Applied Science</em> [Online], Volume 21 Number 2 (23 September 2017)