Columbia subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Massacres--Soviet Union--History--20th century.
World War, 1939-1945--Atrocities--Soviet Union.
World War, 1939-1945--Poland.
Harvard subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Massacres--Soviet Union--History--20th century.
World War, 1939-1945--Atrocities--Russia (Federation)
World War, 1939-1945--Atrocities--Soviet Union.
World War, 1939-1945--Poland.
Princeton subject headings:
Katyn Massacre, Katynʹ, Russia, 1940.
Massacres--Soviet Union--History--20th century.
World War, 1939-1945--Atrocities--Soviet Union.
World War, 1939-1945--Poland.