Columbia subject headings:
Socialism--Bibliography--Catalogs.
Tamiment Library--Catalogs.
Working class--Bibliography--Catalogs.
Harvard subject headings:
Socialism--Bibliography--Catalogs.
Socialism--United States--Bibliography--Catalogs.
Tamiment Library--Catalogs.
Working class--History--Bibliography--Catalogs.
Working class--United States--History--Bibliography--Catalogs.
Princeton subject headings:
Socialism--Bibliography--Catalogs.
Tamiment Institute. Library