الكتب المفهرسة

Professor Dr. Herbert Popp, Universit¨at Mannheim, Professor Dr. Wolfgang Effelsberg, Universit¨at Mannheim, Professor Dr. Gabriele Steidl, Universit¨at Mannheim
علي عبدالله خليفة
Gaurav Bhatnagar, Shikha Mehta, Sugata Mitra