Source: © Wardell-Johnson, Grant. 2000. Biodiversity and Conservation on Namibia into the 21st Century. Pages 17-45 in B. Fuller and I. Prommer, Population-Development-Environment in Namibia: Background Readings. Laxenburg, Austria: IIASA, IR-00-031.

After:
van der Merwe, J.H. 1983. National Atlas of South West Africa (Namibia). Goodwood, South Africa: Cape National Book Printers.
and
Byers, B.A. 1997. Environmental Threats and Opportunities in Namibia. A Comprehensive Assessment. Research Discussion Paper No 21. Windhoek: Directorate of Environmental Affairs, Ministry of Environment and Tourism.