Baker Library Historical Collections. Harvard University Business School Library. Manuscript material and a collection of over 30,000 photographs and engraved images documenting U.S. industrial history.
Manuscript Reading Room, The Library of Congress. Library of Congress. Catalog records of manuscripts pertaining to American history and culture. Links to special online exhibits and digitized historical material.
National Archives and Records Administration (NARA). Historical records of the executive, legislative, and judicial branches of the federal government. Access to Archival Databases by category.
National Union Catalog of Manuscript Collections (NUCMC). Library of Congress. Archives and manuscript repositories throughout the United States. List [by state] of Participating Repositories: Fiscal Years 1959--.
Researcher's Guide to Archives and Regional History Sources, ed. John C. Larsen. Mugar CD 3021 R47 1988.
Smithsonian Institution Research Information System (SIRIS). Library Catalog, Art Inventories Catalog, Archives & Manuscripts Catalog, Research/Bibliographies Catalog, and the Smithsonian Chronology Catalog.