Columbia subject headings:
Harvard subject headings:
Aeronautics--Soviet Union.
Chkalov, Valeriĭ Pavlovich, 1904-1938
Princeton subject headings:
Aeronautics--Soviet Union--History.
Air pilots--Soviet Union--Biography.
Arctic regions--Aerial exploration.
Chkalov, Valeriĭ Pavlovich, 1904-1938.
Transcontinental flights--Soviet Union.