'Abdullah%20bin%20Ja'far%20al-Barmaki%20%D8%B9%D8%A8%D8%AF%20%D8%A7%D9%84%D9%84%D9%87%20%D8%A8%D9%86%20%D8%AC%D8%B9%D9%81%D8%B1%20%D8%A7%D9%84%D8%A8%D8%B1%D9%85%D9%83%D9%8A - Teacher/Student Tree
Teacher/Student Tree of 'Abdullah%20bin%20Ja'far%20al-Barmaki%20%D8%B9%D8%A8%D8%AF%20%D8%A7%D9%84%D9%84%D9%87%20%D8%A8%D9%86%20%D8%AC%D8%B9%D9%81%D8%B1%20%D8%A7%D9%84%D8%A8%D8%B1%D9%85%D9%83%D9%8A