(3GdEfSGf aj GdbQBf GdcQje s - (3C MeO EHQGgje egfG s ((3GdbGgQI (B:s (3GdTQcI GdeUQjI ddWHGYI hGdfTQ (B,s, 1971)
. 240-220 (3HHdjhLQGajG(B: (3UaMGJ(B.s
Keywords: (3GdbQBf GdcQjes; (3GdHMhK GdESdGejI s; (3GdfXQI GdbQBfjI ddEfSGf s