(3TQM bGfhf JMbjb GdLfGjGJ (B/s - (3eMehO eMehO eUWais ((3GdEScfOQjI (B:s (3eWHYI OGQ fTQ GdKbGaI,s, 1947)
(3GdfU HGddZI GdYQHjIs
Keywords: (3bGfhf GdELQGAGJ GdLfGFjIs; (3GdbGfhf GdLfGFjs