S. Rawangwong, C. . Homkhiew, S. Sani, J. Rodjananugoon, and M. Tehyo, “Efficiency Improvement in Assembly Rubber Wooden Toys Using Motion and Time Study and Principles of Ergonomics: A Case Study of a Sample Factory: 1 Faculty of Engineering, Rajamangala University of Technology Srivijaya, 2 Faculty of Engineering, Princess of Naradhiwas University”, Pnu Sci J, vol. 12, no. 2, pp. 97–112, Aug. 2019.