Ong , Xuan-Phong, Thi-Thuong Ngo, and Viet-Hong La. 2025. “Analysis of Morphological Characteristics and Initial Development of Tea Bag Products from Camellia in Na Hang - Tuyen Quang”. HPU2 Journal of Science: Natural Sciences and Technology 4 (02):24-31. https://doi.org/10.56764/hpu2.jos.2025.4.02.24-31.