1. Genetic problems of pipe deposits in South Africa. Anniversary address by the President;Söhnge;Geol. Soc. S. Afr.,1963
2. The geology of the Tsumeb Mine. The geology of some ore deposits in Southern Africa;Söhnge;Geol. Soc. S. Afr.,1964
3. Petrochemistry and age of the Franzfontein granitic rocks of northern South West Africa;Clifford;Geochim. Cosmochim. Acta,1969
4. Stratigraphic interpretation of age measurements in Southern Africa;Nicolaysen,1962
5. The Precambrian geology of South West Africa and Namaqualand;Martin,1965