1. Kimberlites from the Kao pipe, Lesotho;Clement,1973
2. Bau und Tätigkeit von Tuffschloten;Cloos;Geol. Rundschau,1941
3. A review of the geology of kimberlite;Dawson,1967
4. The structural setting of African kimberlite magmatism;Dawson,1970
5. Advances in kimberlite geology;Dawson;Earth Sci. Rev.,1971