Trung, Nguyen Thanh, Sutkhet Nakasathien, and Vichan Vichukit. “Enhancing Sustainable Cassava Production in Hilly Areas of Van Yen, Yen Bai Province, Vietnam”. Agriculture and Natural Resources 47, no. 4 (August 31, 2013): 492–505. Accessed May 18, 2024. https://li01.tci-thaijo.org/index.php/anres/article/view/243089.