O. Geyser
Books
Die Suid-Afrikaanse politieke geskiedenis in beeld
1976
ISBN 9780868860015
THE HISTORY OF THE OLD SUPREME COURT BUILDING
1982
ISBN 9780620057073
Watershed for South Africa, London, 1961
1985
ISBN 9780409113204
Détente in Southern Africa
1977
ISBN 9780868860077
Hertzog en Smuts
1989
ISBN 9780949976475
Jan Smuts and his international contemporaries
2001
ISBN 9781919874104