Books by W. R. Siegfried
Saldanha-Langebaan
Saldanha-Langebaan
Levaillant's legacy
Levaillant's legacy
Keeping the rainbow
A Description of the Benguela
A Description of the Benguela ecology programme, 1982-1986
Conservation of ecosystems
Conservation of ecosystems
South African red data book--A
South African red data book--Aves
A list of the birds of the Geo
A list of the birds of the George District
The birds of Jonkershoek, Stel
The birds of Jonkershoek, Stellenbosch