From the Kansas State Historical Society -- newspapers from around Kansas, some dating back to 1850s. Use the link and scroll down to "verify" to sign in with your Kansas drivers license.
Online source of The Messages and Papers of the Presidents: Washington - Taft (1789-1913; The Public Papers of the Presidents: Hoover to Obama (1929-2012: Book I); • The Weekly Compilation of Presidential Documents: Carter - G.W. Bush (1977-2009); The Daily Compilation of Presidential Documents: Obama-Trump (2009-2017); and, thousands of other documents such as party platforms, candidates' remarks, Statements of Administration Policy, documents released by the Office of the Press Secretary, and election debates.
H-Net Reviews in the Humanities and Social Sciences is an online scholarly review resource that has been publishing reviews since 1993. Review editors from individual H-Net networks choose books for review and seek out qualified reviewers for them.
A comprehensive collection of Dr. King's most significant correspondence, sermons, speeches, published writings, and unpublished manuscripts; curriculum lesson plans; Database with the archival locations of King-related documents, and more.
From the Central Intelligence Agency (CIA), this website provides information on the history, people, government, economy, geography, communications, transportation, military, and transnational issues for 267 world entities.