Columbia subject headings:
Harvard subject headings:
Governmental investigations--United States--History--20th century--Sources.
Katyn Massacre, Katynʹ, Russia, 1940--Sources.
Madden, Ray J. (Ray John), 1892-1987
Polish people--Crimes against--Russia (Federation)--Katynʹ--History--20th century--Sources.
United States. Congress. House. Select Committee to Conduct an Investigation and Study of the Facts, Evidence, and Circumstances on the Katyn Forest Massacre--Sources.
World War, 1939-1945--Atrocities--Russia (Federation)--Katynʹ--Sources.
World War, 1939-1945--Poland--Sources.
Princeton subject headings:
Governmental investigations--United States--History--20th century--Sources.
Katyn Massacre, Katynʹ, Russia, 1940--Sources.
Madden, Ray J. (Ray John), 1892-1987.
Polish people--Crimes against--Russia (Federation)--Katynʹ--History--20th century--Sources.
United States. Congress. House. Select Committee to Conduct an Investigation and Study of the Facts, Evidence, and Circumstances on the Katyn Forest Massacre--Sources.
World War, 1939-1945--Atrocities--Russia (Federation)--Katynʹ--Sources.
World War, 1939-1945--Poland--Sources.