(3dYH hGZGfj GdGWaGd GdTYHjI aj GdbWQ GdYQGbj (B/ s - (3bOhQj , MSjf s; (3Thi , GjdhfGHhQ s ((3HZOGO (B: s (3OGQ GdQTjO ddfTQ , s, 1979)
Keywords: (3GdGZGfj s