(3GdMGSH GdBdj (B: s (3echfGJg h HQGeLg h dZGJg h ESJNOGeg (B/ s - (3SdGeg, Ydj YRJs ((3GdbGgQI (B:s (3eQcR GdGgQGe ddJQLeI,s, 1988)
Keywords: (3GdMhGSjHs; (3dZGJ GdHQeLIs; (3HQeLI GdMGShHs; (3fXe GdJTZjds