Changes in number and distribution of hippoptamus (<i>Hippopotamus amphibius</i>) in the Sabie River, Kruger National Park, during the 1992 drought

by P.C. Viljoen
Published 1995-09-01

The use of the Global Positioning System for real-time data collecting during ecological aerial surveys in the Kruger National Park, South Africa

by P.C. Viljoen, P.F. Retiff
Published 1994-08-01