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สรรพศรี เ. and ฉัพพรรณรัตน์ ย., “A Study of Folk Lanna Music Instruction for Elderly: A Case Study of Kru Prommate Sabpasri (Traditional Thai Northern Folk Music Teacher)”, JOFA-KKU, vol. 11, no. 2, pp. 49–74, Dec. 2019.