(3GdefXeGJ GdOhdjI(B/s - (3eajO eMehO TgGHs ((3GdbGgQI(B:s (3OGQ GdfgVI GdYQHjI,s, 1990)
.(3jTJed Ydi EQLGYGJ HHjdhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbGfhf GdOhdj GdYGes -- (3GdefXeGJ GdOhdjIs