The McVitty mss., 1952-1960, consist of the papers of Marion (Hazard) Etcheverry McVitty, 1911-1971, United Nations observer, in relation to her work in the United World Federalist movement.
The Singer, J. D. mss., 1950-1961, consist of the correspondence and papers of J. David Singer relating to the World Federalist Association in New York.
The Solidaridad International Antifascista mss., 1937-1941, consist of correspondence, receipts, membership lists, ephemera, and broadsides relating to the NY Headquarters of the SIA.
The United World Federalists mss., 1928-1988, consists of correspondence and records relating to the United World Federalists' history, organization, policies, and programs.
The United World Federalists mss. IV, 1927-2011, consists of books, pamphlets, and research related to the United Nations, the environment, and generalized politics, as well as copies of World Federalist Association annual reports, the World Federalist News magazine, and miscellaneous related awards and conferences materials.
The United World Federalists mss. V, 1947-1974, consists of materials from international conferences, various publications, and individuals associated with the organization, including Garry Davis and Charles Heywood.