1. World-Wide Seismograph System, Model 10700,1962
2. Structure and evolution of the Kenya rift valley;Baker;Nature,1971
3. Geology of the Eastern rift system of Africa;Baker;Geol. Soc. Am., Spec. Pap.,1972
4. Chemical aspects of rift magmatism;Barberi,1982
5. Deep seismic soundings in the Afar region and on the Highland of Ethiopia;Berckhemer,1974