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Hurni, Hans; Stähli, Peter (1982). Simen Mountains - Ethiopia Vol II: Climate and the dynamics of altitudinal belts from the last cold period to the present day (Part II in co-authorship with Peter Stähli). Reihe G Grundlagenforschung: Vol. 13. Bern: Geographica Bernensia 10.4480/GB2022.G13
