(3GdOaGY GdTQYi ai VhA GdbVGA hGdabI (B/s - (3YHO GdMejO GdThGQHjs ((3GdGScfOQjI (B:s (3OGQ GdeWHhYGJ GdLGeYjI ,s, 1986)
(3jTJed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdOaGY GdTQYjs; (3GdbGfhf GdLfGFjs