1. Bau und Tätigkeit Tuffschloten, Untersuchungen an den Schwabischen Vulkan;Cloos;Geol. Rundschau,1941
2. Peridotite inclusions and basaltic host rocks;Forbes;Geol. Rundschau,1967
3. Mafic and ultramafic nodules from Itinome-Gata, Japan;Kuno,1967
4. The Menengai Caldera, Kenya Colony;McCall,1957
5. The geology and groundwater conditions of the Nakuru area;McCall,1957