The Treaty of Versailles in the mind of the Germans stabbed them in the back, especially the guilt clause that made them take blame for the First World War. Hitler capaitalized on these sentiments and used them to rally the German people.
Secondary Sources are materials that digest, analyze, evaluate and interpret information contained within primary sources or other secondary sources. Examples. 1  Autobiographies, memoirs, diaries, emails, oral histories.  Letters, correspondences, eyewitnesses.
The materials used for legal research are generally divided into two broad categories: primary sources and secondary sources. Primary sources are laws, orders, decisions, or regulations issued by a governmental entity or official, such as a court, legislature, or executive agency; the President; or a state governor.