EL Sultan, S., A. Hamdon, I. and Nabeel S. Othman, s 2006. Spectrophotometric Determination of Aniline by Azo-Dye Formation with 2, 6-Dihydroxybenzoic Acid-Application to waters. Journal of Education and Science (JES). 18, 2 (Mar. 2006), 24–32. DOI:https://doi.org/10.33899/edusj.2006.78743.