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Hasibuan ML, Sumardi S, Zebua NF, Sari N. Caffeine Content Analysis of Arabica Coffee Beans with Variation Roasting Temperatures Grown in Aek Sabaon South Tapanuli. JPS [Internet]. 2023 Jun. 26 [cited 2024 Nov. 21];6(2):681-9. Available from: https://journal-jps.com/new/index.php/jps/article/view/116