Troll Carl Geoecology of the high-mountain regions of Eurasia : proceedings of the symposium of the International Geographical Union Commission on High-Altitude Geoecology, November, 20-22, 1969 at Mainz = Landschaftsökologie der Hochgebirge Eurasiens : Verhandlungen des Symposiums der International Geographical Union Commission on High-Altitude Geoecology, 20.-22. November 1969 in Mainz Wiesbaden : 1972.
