• 3 Wisconsin Historical Society Library
• 2 WHS State Archives Preservation Facility
• 1 Memorial Library
• 1 Wisconsin Historical Society Archives

• 3 Politics and government
• 2 Labor
• 1 Communism
• 1 Hispanic Americans
• 1 International Committee Against Racism
• 1 World politics

• 2 Progressive Labor Party
• 1 External Fraction of the International Communist
• 1 International Committee Against Racism
• 1 Progressive Labor Movement (Brooklyn, New York, N.Y.)

• 3 English
• 3 Spanish

• 3 United States
• 1 New York (N.Y.)
• 1 New York County (N.Y.)

• 3 Periodicals
• 2 Newspapers

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