EL Sultan, Saad, Inam A. Hamdon, and s Nabeel S. Othman. 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):24-32. https://doi.org/10.33899/edusj.2006.78743.