(3GVhGA Ydi GdTNUjI GdGfSGfjI (B: s (3JYQjagG (B- (3fXQjJgG (B- (3bjGSgG (B/ s - (3GdYGfj, fRGQ, s 1939-(3, s ((3HZOGO, GdYQGb (B: s (3OGQ GdTDhf GdKbGajI GdYGeI (B(((3GaGb YQHjI(B))(3 (B989.s, 1989)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B104-108.s
Keywords: (3GdTNUjIs -- (3GdLhGfH GdfaSjI(B.s; (3GdMjGIs -- (3GdLhGfH GdfaSjI(B.s; (3GdSdhc GdGLJeGYj(B.s