Business Finance and Value-Added Evaluation of Pagar Alam Robusta Coffee (Coffea Canephora) Functional Product with the Addition of Crude Catechin Extract from Gambir (Uncaria gambir (Hunter) Roxb). Resocia [Internet]. 2026 Jul. 20 [cited 2026 Jul. 28];1(3):96-107. Available from: https://researchfrontiers.id/resocia/article/view/240