4. Primary source - Wikipedia
Link: https://en.wikipedia.org/wiki/Primary_source
Description: WEBIn the study of history as an academic discipline, a primary source (also called an original source) is an artifact, document, diary, manuscript, autobiography, recording, or any other source of information that was created at the time under study. It serves as an original source of information about the topic.
DA: 83 PA: 74 MOZ Rank: 100