(3bhGfjf GdWhGQF h GdChGeQ GdYScQjI (B/s - (3eUWai cGed efjHs ((3GdbGgQI (B:s (3OGQ GdacQ GdYQHj ,s, 1973)
(3jTJed Ydj GQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdJTQjYGJ GdLfGFjI GdESJKfGFjIs; (3GdbGfhf GdLfGFjs