Primary sources are documents, books, articles, and other materials written or collected at the time of an event, or by people who have first-hand knowledge of the event. Diaries, memoirs, court documents, autobiographies, and other "I was there" materials fall into this category.
Newspaper and news magazine accounts contemporaneous to an event may also be considered primary sources for some purposes.
Letulle, Claude J. Nightmare Memoir: Four Years as a Prisoner of the Nazis
Marks, Jane. The Hidden Children: The Secret Survivors of the Holocaust
Office of U. S. Chief Counsel for Prosecution of Axis Criminality. Nazi Conspiracy and Aggression
Tessler, Rudolph. Letter to My Children: From Romania to America Via Auschwitz
Stojka, Karl. The Story of Karl Stojka: A Childhood in Birkenau: Exhibition at the Embassy of Austria, April 30 to May 29, 1992; Catalogue
The Liberation of the Nazi Concentration Camps 1945: Eyewitness Accounts of the Liberators
Trials of War Criminals Before Nuernberg Military Tribunals, Under Control Council Law no. 10, Nuernberg, October 1946-April 1949
Trials of the Major War Criminals Before the International Military Tribunal
Accused war criminals being flown to Poland.
Photo: SYddeutscher Verlag Bilderdienst. From http://www.holocaustchronicle.org/StaticPages/641.html