(3QLGd Mhd GdfHj Udi Gddg Ydjg h Sde (B/ s - (3GdRjf, fHjd YHO GdbGOQs ((3YeGf (B:s (3OGQ GSGeg ddfTQ hGdJhRjY,s, 1997)
Keywords: (3GdUMGHI h GdJGHYhfs; (3Bd GdHjJs; (3GdESdGes; (3GdJQGLes