Mount Everest: Formation, Population and Exploration of the Everest Region: Hagen, Toni, Günter-Oskar Dyhrenfurth, Christoph von Fürer-Haimendorf, & Erwin Schneider
Mount Everest: Formation, Population and Exploration of the Everest Region: Hagen, Toni, Günter-Oskar Dyhrenfurth, Christoph von Fürer-Haimendorf, & Erwin Schneider