The National Archives and Records Administration (NARA) is the nation's record keeper. Of all documents and materials created in the course of business conducted by the United States Federal government, only 1%-3% are so important for legal or historical reasons that they are kept by us forever.
Those valuable records are preserved and are available to you, whether you want to see if they contain clues about your family’s history, need to prove a veteran’s military service, or are researching an historical topic that interests you.
U.S. National Archives and Records Administration Dataverse is covered by Thomson Reuters Data Citation Index. NARA Dataverse is part of the Harvard Dataverse.
See also Online Research Tools and Aids: http://www.archives.gov/research/start/online-tools.html
re3data.org: U.S. National Archives and Records Administration Dataverse;
editing status 2018-12-07;
re3data.org - Registry of Research Data Repositories. http://doi.org/10.17616/R3Q624
last accessed: 2019-02-18