Wikipedia can help begin research on an unfamiliar subject. The references at the bottom of an entry provide an initial source list. Those works lead to their own bibliographies and sources, allowing the research to expand beyond the page. Wikipedia is a signpost toward citable material rather than the authority supporting the final claim. The site is also useful for finding images for explanatory videos.
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Wikipedia as a research starting point
On an unfamiliar subject, historians can use Wikipedia to find cited works and then follow those works' own bibliographies and sources.