(3MQjI GdacQ h JQTjO GdhGbY GdESdGei (B/s - (3YGUe CMeO YLjdIs ((3GdbGgQI (B:s (3YGde GdcJH,s, 1990)
(3jTJed Ydi EQLGYGJ HHjdhLQGajI(B.s
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdESdGe hGdacQ GdZQHis