Khalid, B., Yaqub, A., Arif, M. F., Liaquat, L. and Iqbal, B. (2010) “Study of Colour Measurements of Leather Dyed with Walnut Bark Natural Dye: Walnut Bark Dyed Leather”, Biological Sciences - PJSIR, 53(5), pp. 252–257. Available at: https://v2.pjsir.org/index.php/biological-sciences/article/view/473 (Accessed: 22 November 2024).