Columbia subject headings:
Harvard subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Poland--Foreign relations--Soviet Union
Soviet Union--Foreign relations--Poland.
Princeton subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Poland--Foreign relations--Soviet Union.
Soviet Union--Foreign relations--Poland.
World War, 1939-1945--Atrocities.