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M. Khamwan, “Trail of Tai Daeng (Red Tai), a Forgotten Ethnic Group: A Case Study of Tai Daeng in Ban Huai Phak Nao, Lat Khang Sub-District, Phu Ruea District, Loei Province”, LRUJ, vol. 16, no. 57, pp. 77–88, Jul. 2021.