(3GdOaGY GdTQYi ai VhA GdbVGA hGdabI (B/s - (3YHO GdMejO GdThGQHjs ((3GdGScfOQjI (B:s (3efTCI GdeYGQa ,s, 1998)
(3jTJed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdOaGY GdTQYjs; (3GdbGfhf GdLfGFjs