Columbia subject headings:
Hiking--Guidebooks--History.
Hiking--Soviet Alps Region--History--1928-1953.
Harvard subject headings:
Hiking--Guidebooks--History.
Hiking--Soviet Alps region--History--1928-1953.
Mountaineering expeditions--Soviet Union--History--20th century.
Mountaineering--Soviet Union--History--20th century.
Soviet Union--History--1925-1953.
Soviet Union--Social conditions.
Princeton subject headings: