Bonnefille, R.; Robert, C.; Lezine, A. M.; Perinet, G.; Delibrias, G.; Elenga, C.; Herbin, J. P.; Tiercelin, J. J. (1986). "Palaeoenvironment of Lake Abijata, Ethiopia, during the past 2000 years". Geological Society, London, Special Publications. 25 (1): 253–265. doi:10.1144/gsl.sp.1986.025.01.21. ISSN0305-8719. S2CID128780442.
Bonnefille, R.; Robert, C.; Lezine, A. M.; Perinet, G.; Delibrias, G.; Elenga, C.; Herbin, J. P.; Tiercelin, J. J. (1986). "Palaeoenvironment of Lake Abijata, Ethiopia, during the past 2000 years". Geological Society, London, Special Publications. 25 (1): 253–265. doi:10.1144/gsl.sp.1986.025.01.21. ISSN0305-8719. S2CID128780442.
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Bonnefille, R.; Robert, C.; Lezine, A. M.; Perinet, G.; Delibrias, G.; Elenga, C.; Herbin, J. P.; Tiercelin, J. J. (1986). "Palaeoenvironment of Lake Abijata, Ethiopia, during the past 2000 years". Geological Society, London, Special Publications. 25 (1): 253–265. doi:10.1144/gsl.sp.1986.025.01.21. ISSN0305-8719. S2CID128780442.