(3jhfS GdSHYGhj (B: s (3SjQI SjGSj YUGej (B/ s - (3GdYeQj , NjQj s ((3HZOGO (B: s (3OGQ GdQTjO , s, 1980)
Keywords: (3GdQLGd s -- (3JQGLe s