National socialism, Holocaust, resistance and exile 1933-1945, and Daily reports of the Gestapo Headquarters Vienna 1938-1945 contains about 40,000 primary sources on the National Socialist state and the NSDAP, Nazi ideology and propaganda, National Socialist justice and legislation, on resistance and persecution, and annihilation and expulsion in the "Third Reich".'

The International Tracing Service (ITS) holds records of over 17 million World War II era displaced persons. More information: “Major Holocaust Document Collection Digitized," Hamodia, Jan. 16, 2017.

U.S. Relations with the Vatican and the Holocaust, 1940-1950

USC Shoah Foundation Visual History Archive contains the visual testimonies  from Holocaust survivors (1939-1945) together with survivor testimony from the 1994 Genocide against the Tutsi in Rwanda (1994), the Armenian Genocide (1915-23) the Cambodian Genocide, the Guatemalan Genocide (1978-96) and the Nanjing Massacre (1937). User guide

Deutsche Geschichte im 20. Jh.: Nationalsozialismus, Holocaust, Widerstand und Exil 1933-1945 Online

United States Memorial Holocaust Museum

Yad Vashem: The World Holocaust Remembrance Center

Arolsen Archives - International Center on Nazi Persecution

Labor & The Holocaust: The Jewish Labor Committee and the Anti-Nazi Struggle (NYU)