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ทองไสลพ, สุนทรกนกพงศ์ว, เพ็ชร์แสงศรีศ. THE DEVELOPMENT OF AN E-LEARNING COURSEWARE ON DATA, VARIABLES AND CONSTANTS FOR GRADE 12 STUDENTS. J. IND. EDUC. [Internet]. 2017Apr.28 [cited 2020May30];16(1):42-9. Available from: https://ph01.tci-thaijo.org/index.php/JIE/article/view/123852