Panyawai T, Narongwit P. Design of Trade mark Promotional for Granite Mortar Network System in Mae Slid Sub-District, Bantak District, Tak Province. gts [internet]. 2026 May 1 [cited 2026 Sep. 13];3(2):57-68. available from: https://li02.tci-thaijo.org/index.php/gts/article/view/1750