peruslähteeseen
Peruslähde is a Finnish term that translates to "basic source" or "primary source" in English. It refers to an original document, artifact, or other piece of information that was created at the time under study or by someone with direct personal knowledge of the events or conditions being investigated. Peruslähteet are considered the raw material of historical research and are essential for understanding past events without the filter of later interpretation.
Examples of peruslähteet can include letters, diaries, government records, photographs, interviews, oral histories, and contemporary newspaper