ชำนาญ ว, โสธะโร ส. INSTRUCTIONAL ACTIVITY PACKAGE ON LINEAR PROGRAMMING USING A GRAPHIC CALCULATOR FOR MATHAYOMSUKSA FIVE STUDENTS. J. IND. EDUC. [Internet]. 2018 Aug. 31 [cited 2024 Apr. 26];17(2):134-42. Available from: https://ph01.tci-thaijo.org/index.php/JIE/article/view/119600