primary source
artifact, document, diary, manuscript, autobiography, a recording, or other source of information that was created at the time under study
en-US/ˈpɹaɪˌmɛɹi soʊɹs/
en-GB/ˈpɹaɪməɹɪ ˈsɔːs/
artifact, document, diary, manuscript, autobiography, a recording, or other source of information that was created at the time under study