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MHD ZOL MZA, MOHD RUS AZ. The Physical Characteristics of Handmade Soap Made Up Using Used Cooking Oil. rpmme [Internet]. 2023 Aug. 7 [cited 2026 Mar. 12];4(1):540-7. Available from: https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/3780