David Rumsey Historical Map Collection - David Rumsey’s Map Collection with more than 30,000 images, searchable by keyword

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Digital History - a wealth of links to textbook, primary sources, and educational materials in digital history

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Fold3 - Get access to historical military records through Fold3, the web’s premier collection of original military records and memorials

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History Engine - Learn history by researching, writing, and publishing, creating a collection of historical articles in U.S. history that can be searched for here by scholars, teachers, and the general public

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Internet Modern History Sourcebook - find thousands of sources in modern history. Browse and search to find full texts, multimedia, and more

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More links on Cyclopaedia Universalis – Research – History