(3TQM bGfhf GdYbhHGJ GdYGe GdbSe GdYGe(B.s (3GdcJGH GdChd,s (3GdfXQjI GdYGeI ddLQjeI(B/s - (3Ydj YHOGdbGOQ GdbghLjs author ((3GdCScfOQjI(B:s (3OGQ GdgOi ddeWHhYGJ,s, 1997)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3bGfhf GdYbhHGJs; (3GdbGfhf GdLfGFjs