Tanthanapanyakorn, P., Sanguanchue, A., Khuntikulanon, N., Chanmalee, S., Cetthakrikul, S. and Wongpituk, K. 2021. Effectiveness of the Self-Care Sandbag Exercise Program for the Osteoarthritis of Knee Patients in the Secondary Care in Thailand: Randomized Control Trial. International Journal of Geoinformatics. 17, 5 (Nov. 2021), 195–204. DOI:https://doi.org/10.52939/ijg.v17i5.2051.