(3GdfXe GdSjGSjI (B/s - (3KQhJ HOhj s ((3GdbGgQI (B:s (3OGQ GdfgVI GdYQHjI (B,s, 1961)
.549-541 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3GdfU CZdHg HGddZI GdYQHjI HYV GdfUhU GdEfLdjRjI hGdaQfSjIs
Keywords: (3GdbGfhf GdOSJhQjs