EL Sultan, Saad, Inam A. Hamdon, and s Nabeel S. Othman. “Spectrophotometric Determination of Aniline by Azo-Dye Formation With 2, 6-Dihydroxybenzoic Acid-Application to Waters”. Journal of Education and Science (JES) 18, no. 2 (March 1, 2006): 24–32. Accessed August 4, 2025. https://rjps.uomosul.edu.iq/index.php/edusj/article/view/17576.