Ali, R . A., AbdulMunem, O.M., AND Salim, S. R.. " Spectral Study of the Pollutants ( Gelbstoff) in Water Liquefaction of Some areas of Baghdad Province by Using the Technique of Raman, Flora" Ibn AL- Haitham Journal For Pure and Applied Science [Online], Volume 25 Number 2 (8 May 2017)