O. Geyser

• Bibliographies on South African political history
• Détente in Southern Africa
• Jan Smuts and his international contemporaries
• Watershed for South Africa
• Watershed for South Africa, London, 1961
• Die Nasionale Party
• Die Suid-Afrikaanse politieke geskiedenis in beeld
• Hertzog en Smuts
• THE HISTORY OF THE OLD SUPREME COURT BUILDING