Jamsai, J. and Techawattanasiridumrong, W. 2020. THE DEVELOPMENT OF A TRAINING PROGRAM FOR PHYSICAL FITNESS STRENGTHENING OF STUDENTS IN MATTAYOMSUKSA TWO, NAKHONLUANG UDOMRATWITTHAYA SCHOOL, THE SECONDARY EDUCATIONAL SERVICE AREA OFFICE 3. Journal of MCU Nakhondhat. 7, 12 (Dec. 2020), 94–106.