(3GddSGf Hjf GdSYGOI hGdTbGA (B/ s - (3YHOGdZfi YHOGdQMef eMeOs ([S.N] : (3GdGfOdS ddGYdGe , s, 1990)
Keywords: (3GdYbGFO GdGSdGejIs; (3GdYbGFOs