hasan salama. "Preparing a program to teach the Logo language to computer teachers and their students in the first grade of secondary school, and studying the relationship between the concepts and skills of these teachers and the concepts and skills of their students in the same program /". المجلة التربوية لکلية التربية بسوهاج, 7, 7, 1992, 223-254. doi: 10.21608/edusohag.1992.130748