secondary sources

Secondary sources are materials that interpret, analyze, or summarize primary sources. In the context of general knowledge, they provide insights built upon original information, such as research articles, history books, reviews, documentaries, or encyclopedias. For instance, a history book discussing events based on original documents and testimonies is a secondary source. These sources help us understand and contextualize the primary information but are not firsthand accounts themselves. They are valuable for gaining broader perspectives on a topic by synthesizing various primary data.