(3MLjI GdMce GdLfGFi CeGe GdbVGA GdeOfi (B/s (3JCdja GdOcJhQ EOhGQ ZGdi GdOgHi GdeMGei HEOGQI bVGjG GdMcheI(B.s - (3EOhGQ ZGdj GdOgHjs ((3GdbGgQI (B:s (3ecJHI GdfgVI GdeUQjI ,s, 1960)
357-368 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3jTed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbGfhf GdLfGFjs