Columbia subject headings:
Harvard subject headings:
American Federation of Labor
Congress of Industrial Organizations (U.S.)
International Confederation of Free Trade Unions.
Zenkoku Rōdō Kumiai Sōrengō.
Princeton subject headings:
American Federation of Labor.
Congress of Industrial Organizations (U.S.)
International Confederation of Free Trade Unions.
Zenkoku Rōdō Kumiai Sōrengō.