(3GZJUGH GdEfGK aj GdeLJeYGJ GdbOjeI hGdeYGUQI (B/s - (3eLPhH, CMeO Ydjs ((3GdbGgQI (B:s (3GdOGQ GdeUQjI GddHfGfjI,s, 1993)
(3HHdjhLQGajI (B: (3U(B. 271-278.s
Keywords: (3GdGZJUGHs; (3LQGFe GdBOGH GdYGeIs; (3GdLQGFe GdLfSjIs