Häußler, M. “Review: Peter Curson, Border Conflicts in a German African Colony. Jakob Morengo and the Untold Tragedy of Edward Presgrave, Arena Books 2012”. Journal of Namibian Studies : History Politics Culture, Vol. 13, June 2014, pp. 105-7, https://namibian-studies.com/index.php/JNS/article/view/135.