Isaacson, Margaretha2015-07-282015-07-282015-07-28http://hdl.handle.net/10539/18135A Thesis Submitted to the Faculty of Medicine, University of the Witwatersrand, in Partial Fulfilment of the Requirements for the Degree of Doctor of Medicine Johannesburg 1972enHuman plague in Southern Africa during the period 1965-1969Thesis