Asia, Tibet, Cho Oyu   
Publication Year: 1991.
Cho Oyu. A Japanese expedition of 13 climbers was led by Takao Haga. They climbed the normal route from the north: the west ridge and west face. On April 27, Hiroshi Kato, Yasushi Tanahashi, Mingma Tenzing Sherpa and Pekka Tenja Sherpa completed the 66th ascent of the peak.
Elizabeth Hawley