Historical materials/sources — documents, records, artifacts, etc., used as primary materials for studying history.
史料を調べて当時の暮らしを再現した。
I examined historical sources to reconstruct life at that time.
重要な史料が図書館の地下で見つかった。
Important historical documents were found in the library's basement.
史料に基づく検証が学術論文の基本だ。
Verification based on historical sources is fundamental to academic papers.