Asiagwu, A.K., J.O. Otutu, I.E. Onyesom, and J.K. Ebigwai. “Extraction and Application of Natural Colourant from the Bark of Berlinia Grandiflora on Cotton and Polyamide 6 Fabrics”. Iraqi Journal of Science 62, no. 6 (July 1, 2021): 1745-1760. Accessed October 16, 2021. https://ijs.uobaghdad.edu.iq/index.php/eijs/article/view/2385.