Kongkird S, Fang S-Y, Songsanandr P, Rodsomboon S. Product Development and Upgrading Marketing Potential of Degraded Longan to Commerce in Lamphun Province. Ph.D. in Soc. Sci. J. [internet]. 2026 Apr. 2 [cited 2026 Aug. 30];16(1):e278258. available from: https://so05.tci-thaijo.org/index.php/phdssj/article/view/278258