(3GdbGfhf hGdfXGe GdGLJeGYi (B/ s - (3eMehO GHhRjOs ((3GdbGgQI(B;s (3OGQ GdcJGH ddWHGYI hGdfTQ hGdJhRjY(B:s, 1987)
Keywords: (3adSaI GdbGfhfs