1. Strychnine poison and the conservation of avian scavengers in the Karoo, South Africa;Allan;S. Afr. J. Wildl. Res.,1989
2. The Guide to Lesotho;Ambrose,1976
3. Rare birds killed;Bokmakierie,1966
4. Report on agriculture and pastoral production, Part 2. Agricultural Census,1970
5. Report on agriculture and pastoral production, Part 2. Agricultural Census,1978