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พ้นภัย พ, สืบสาร พ, พรมมี ว. Improved Illumination Model of LED Street Light at Rajamangala University of Technology Lanna, Chiang Rai. RMUTL.Eng.J. [internet]. 2017 Dec. 1 [cited 2026 Aug. 28];2(2):25-3. available from: https://ph01.tci-thaijo.org/index.php/RMUTLEngJ/article/view/183567