"ALUMIMIUM-VEGETABLE COMBINATION TANNAGE FOR PRODUCTION OF SHOE UPPER LEATHERS". Journal of Veterinary Medicine and Animal Production 2, no. 1 (نوفمبر 20, 2022). تاريخ الوصول مايو 25, 2026. https://onlinejournals.uofk.edu/vet/article/view/1151.