Plug, C E2012-02-202012-02-201983Plug, C.E. 1983. Simulasie in Geskiedenis in die primêre skool (I). Yesterday & today = Gister en vandag, 5:13-20, Apr. [http://www.sashtw.org.za/index2.htm] [http://dspace.nwu.ac.za/handle/10394/5126]2223-0386http://hdl.handle.net/10394/5593otherArticle