(3eLeY GdHjGf dYdhe GdbQBf (B:s (3GdLRA GdKGdK (B/s - (3GdWHQSi, GdSYjO CHh GdaVd Hf GdMSfs ((3GdbGgQI (B:s (3OGQ GdJbQjH Hjf GdePGgH GdESdGejI,s, 1960)
(3GdfU HGddZI GdYQHjIs
Keywords: (3GdbQBf GdcQje hGdYdhe GdbQBfjIs; (3GdTQjYI GdESdGejIs