The Effectiveness of Knowledge Management on Exercise to Reduce Schmerz of Body of Elderly persons at Lardyai, Muang, Samut Songkharm Province. - Phannee Rojanabenjakun; Pongsak Jaroenngarmsamer; Tipvarin Benjanirat; Jatuporn Ounprasertsuk; Chotika Dansunandana; Yonusa Tongrit (ICDTE, 2019)