Columbia subject headings:
Armenian Genocide, 1915-1923.
Genocide.
Hitler, Adolf, 1889-1945--Psychology.
Hitler, Adolf, 1889-1945.
Poland--History--Occupation, 1939-1945.
World War, 1939-1945--Causes.
World War, 1939-1945--Poland.
Harvard subject headings:
Armenian Genocide, 1915-1923
Genocide
Hitler, Adolf, 1889-1945--Psychology.
Hitler, Adolf, 1889-1945--Views on genocide.
Poland--History--Occupation, 1939-1945
World War, 1939-1945--Causes--Sources.
World War, 1939-1945--Causes.
World War, 1939-1945--Poland.
Princeton subject headings: