(3GdTGed aj CUhd GdOjf (B/ s - (3GdLhjfj, YHO Gddg Hf jhSas; (3cdhjaQ, gdehJs ((3GdbGgQI (B:s (3OGQ GdYQH ddHSJGfj,s, 1989)
Keywords: (3GdESdGes; (3Gdabgs; (3GdCTGYQIs; (3GdaQb GdESdGejIs