Primary sources are documents or objects that are original and provide direct, first-hand evidence.
The Online Dictionary for Library and Information Science by Joan Reitz provides the following definition for primary source:
In scholarship, a document or record containing firsthand information or original data on a topic, used in preparing a derivative work. Primary sources include original manuscripts, periodical articles reporting original research or thought, diaries, memoirs, letters, journals, photographs, drawings, posters, film footage, sheet music, songs, interviews, government documents, public records, eyewitness accounts, newspaper clippings, etc.
When searching for books or articles on your topic, use any of the following subject terms to narrow down your results to these primary sources:
Check the bibliographies of secondary sources you are using (including encyclopedia entries, periodical articles, etc.) as there will no doubt be primary sources cited there. For more information, check out the Library's Primary Sources Guide.
Congressional Record: Microfilm, Subbasement, 1933 - 1956
House Foreign Affairs Committee: Search by legislation, committee reports, house communications, or meetings; documents go back to 1973.
Senate Foreign Relations Committee: Search by legislation, reports, treaty documents, communications, or meetings; documents go back to 1949.
Links to primary sources can be found by searching within the Documents tab. Founded in 1985 by journalists and scholars to check rising government secrecy, this archive combines a unique range of functions: investigative journalism center, research institute on international affairs, library and archive of declassified U.S. documents.
Office of the Historian: Historical Documents
The Office of the Historian is responsible, under law, for the preparation and publication of the official documentary history of U.S. foreign policy in the Foreign Relations of the United States series. This series presents the official documentary historical record of major U.S. foreign policy decisions. The series began in 1861 and contains documents from the Presidential libraries, Departments of State and Defense, National Security Council, Central Intelligence Agency, Agency for International Development, and other foreign affairs agencies as well as the private papers of individuals involved in implementing U.S. foreign policy.
Foreign Relations of the United States
As part of the Digital Collections of the University of Wisconsin, this site offers almost a complete run of the Foreign Relations of the United States from 1861-1960.
As a service of the U.S. Government Publishing Office, this site provides free public access to official publications from all three branches of the Federal Government. You can search documents alphabetically, by category, date, committee, or author.
This site provides free access to manuscripts, rare books, maps, photographs, and other important cultural documents from all cultures and countries.