I. Alsaif, Khalel, خلیل, Yahya Q. Alqathely, یحیى, Nagham T. Chalmeran, and نغم. 1970. “Calculate Weights for a Numerical Number Image”. Journal of Education and Science (JES) 24 (4):119-31. https://doi.org/10.33899/edusj.1970.58934.