REMOVE

1. Composite Map
2. Separate Map
3. Whitney, J.D.
4. Julius Bien

WHAT

1. Atlas Map (1)
2. World Atlas (1)

WHERE

1. Chad (1)
2. Libya (1)
3. Sahara (1)

WHO

1. Hassel, S. G. H., 1779-18 … (1)
2. Ode, Henri (1)
3. Ph. Vandermaelen (1)
4. Vandermaelen, Philippe, 1 … (1)

WHEN

1. 1827 (1)