(3GdYbO hGdLRGA GdLfGFi (B:s (((3OQGSI ebGQfI (B)) /s - (3MSf YHO GdeDef s ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI ,s, 1993)
. 351- 327(3HHdjhLQGajG(B: (3UaMGJ(B.s
(3jTJed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbGfhf GdLfGFis