Sources:

• Ellis, Stephen, ' The Mask of Anarchy - The Destruction of Liberia and the Religious Dimension of an African Civil War' (New York, 1999).
• Greene, Graham, 'Journey without Maps' (London, 1936; reprinted in 1976).
• Guenter, Abe, 'Jungle Pilot in Liberia' (Schaumburg, Illinois, 1992)
• Johnston, Sir Harry, 'Liberia', 2 vols. (New York, 1906)
• Junge, Werner, 'African Jungle Doctor - Ten Years in Liberia' (London, 1952). 
• Strong, Richard P. (ed.), 'The African Republic of Liberia and The Belgian Congo - Based On The Observations Made and Material Collected During The Harvard African Expedition 1926-27', 2 vols. (Cambridge, 1930). 
• Van Der Kraaij, Fred, Personal recollections.

 © fpm van der kraaij