Okafor C. O., and Nwokonkwo D.C. “Synthesis of a New Vat Dye”. International Journal of Research in Chemistry and Environment (IJRCE) 2, no. 1 (December 31, 2011): 175–177. Accessed November 22, 2024. https://ijrce.org/index.php/ijrce/article/view/155.