Columbia subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Kozelʹsk (Russia : Concentration camp)
Massacres--Soviet Union.
World War, 1939-1945--Atrocities--Soviet Union.
Harvard subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Massacres--Soviet Union.
World War, 1939-1945--Atrocities--Soviet Union.
World War, 1939-1945--Soviet Union--Atrocities.
Princeton subject headings: