Barnard P (Ed.) 1998. Biological Diversity in Namibia: A Country Study. Namibian National Biodiversity Task Force, Windhoek.
Chapter on birds:
- Brown CJ, Jarvis AM, Robertson A & Simmons RE. 1998. Bird Diversity. In: Biological Diversity in Namibia: A Country Study. Ed. P Barnard. pp. 155-162. Namibian National Biodiversity Task Force, Windhoek.
ISBN 978-0869764367