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กลมกลาง ร, รัตนโอฬาร ธ, ภู่พัฒน์ ผ. Development of Skill Package on the Basic Technical Drawing Orthographic Views For Vocation Certificate Level Student. J. IND. EDUC. [Internet]. 2015 Dec. 31 [cited 2024 Mar. 28];14(3):85-91. Available from: https://ph01.tci-thaijo.org/index.php/JIE/article/view/122306