(3GdTQb GdChSW aj SYjg Edi GdSdGe (B/s - (3ajdjH, QhfOhs ((3HjQhJ (B:s (3GdefThQGJ GdYQHjI ,s, 1973)
Keywords: (3GdSdGes; (3GdTQb GdChSW s