(3ehba GdGSdGe ef fXQjGJ GdOaGY GdGLJeGYi (B/s - (3eMeO GdMHjH GdJLcGfjs ((3GdeZQH (B:s (3OGQ GdfTQ GdeZQHjI ,s, 1987)
(3jTJed Ydi EQLGYGJ HHjdhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdGSdGes -- (3OaY eWGYfs