Primary Sources originate in the time period that historians are studying. They may include diaries, letters, eyewitness reports, personal memoirs, government documents, oral histories and contemporary visual sources. "Experienced researchers look for data in primary sources first ... Secondary sources are books and articles that analyze primary sources." A Manual for Writers ..." by K. Turabian. 7th ed. 2007. MSVU: Ref. LB 2369 T8 2007.