Não informado. (1973). Journal of the Society of Leather Technologists and Chemists. Society of Leather Technologists and Chemists.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিNão informado. Journal of the Society of Leather Technologists and Chemists. Redbourne, Inglaterra: Society of Leather Technologists and Chemists, 1973.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিNão informado. Journal of the Society of Leather Technologists and Chemists. Society of Leather Technologists and Chemists, 1973.
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