(3GdhLjR (B:s (3aj eHGOF GdbGfhf GdOSJhQj hGdfXe GdSjGSjI GdebGQfI (B/ s (3GdcJGH GdChds - (3eUWai eMehO Yajajs ((3eUQ (B:s [(3GdfGTQ ZjQ eMOO(B] (3,s, 1988)
(3HHdjhLQGajG(B: (3UaMGJ (B485 - 495.s
(3jTJed Ydi EQLGYGJ HHdjhLQGajIs
Keywords: (3GdbGfhf GdOSJhQjs