Columbia subject headings:
Duke University. Library. Manuscript Department.
Socialism--United States--History--Sources--Bibliography--Catalogs.
Socialist Party (U.S.)--Archives.
Harvard subject headings:
Duke University. Library. Manuscript Department.
Socialism--United States--History--Sources--Bibliography--Catalogs.
Socialism--United States--Sources--Bibliography--Catalogs.
Socialist Party (U.S.)--Archives.
Princeton subject headings: