Spies, S B(Afdeling Plaaslike en Streekgeskiedenisnavorsing van die lnstituut vir Geskiedenisnavorsing, RGN / Division for Local and Regional History Research, Institute for Historical Research, HSRC, 1988)
Spies, S B(Afdeling vir Navorsing oor Streek- en Sosio-ekonomiese Geskiedenis van die lnstituut vir Geskiedenisnavorsing, RGN / Division for Research into Regional and Socio-economic History, Institute for Historical Research, HSRC, 1987)