(3fTGI GdMQcI GdYQHjI GdMOjKI (B:s (3GfHYGKgG heVGgQgG hSjQgG aj Ref GdOhdI GdYKeGfjI Gdi GhGFd GdMQH GdYGdejI GdGhdi (B: (3JGQjN hePcQGJ hPcQjGJ hJYdjbGJ (B/s - (3OQhRI , eMeO YRI s ((3HjQhJ(B:s (3GdecJHI GdYUQjI ,s, 1949)
Keywords: (3GdYGde GdYQHj (B-(3JGQjN (B-(3GdYUQ GdYKeGfj s