(3GdbUI h GdMcGjI aj GdTYQ GdYQHj aj UOQ GdESdGe h GdYUQ GdCehj (B/ s - (3GdNWjH, HTQi eMeO Ydjs ((3HZOGO (B:s (3OGQ GdTDhf GdKbGajI GdYGeI (B- (3BaGb YQHjI,s, 1990)
Keywords: (3GdTYQ GdCehjs