Primary source

noun · History and geography

Definition

A first-hand record created at the time of an event or by someone who experienced it.

Examples include letters, diaries, photographs and official records.

A diary from the period.

The same item can be primary for one question and secondary for another.

Secondary sourceA source created later that analyses or interprets primary sources.
BiasA tendency to present or favour one point of view unfairly.

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