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