(3ef GdTYQ GdefShH Edi GdEeGe GdhUj Ydj Hf CHj WGdH Ydjg GdSdGe (B/ s - (3SjO GdCgd, YHO GdYRjRs ((3HjQhJ (B:s (3OGQ UGOQ,s, 1980)
Keywords: (3GdTYQ GdESdGejs