Pretorius, Stephan2012-08-022012-08-021989Pretorius, S. 1989. What obstacles hindered German unity in 1850 and how did Bismarck overcome them before 1871?. Yesterday & today = Gister en vandag, 18:20-21, Sep. [http://www.sashtw.org.za/index2.htm] [http://dspace.nwu.ac.za/handle/10394/5126]2223-0386http://hdl.handle.net/10394/6876enArticle