McCully, R.M.; Van Niekerk, J.W.; Kruger, S.P.; Jansen, B.C.
(Pretoria : The Government Printer, 1967)
Necropsies were conducted on 100 hippopotami during the winter of 1964 in an area of the Kruger National Park where the continuous drought, over a period of three years, had reduced food supplies to a very low level. ...