• 34 Memorial Library
• 10 Wisconsin Historical Society Library
• 3 ILL Library
• 3 WHS State Archives Preservation Facility
• 2 Special Collections (Memorial Library)
• 1 Temporary Relocation Library

• 4 Microforms

• 9 Communism
• 9 Politics and government
• 8 Anarchism
• 7 Italian Americans
• 5 History
• 5 Labor movement
• 5 Labor unions
• 4 Working class
• 3 Employees
• 3 Partito socialista italiano
• 2 Food industry and trade
• 2 Italians
• 2 New Left
• 1 Almanacs, Argentine
• 1 Almanacs, Italian
• 1 Anarchists
• 1 Anti-fascist movements
• 1 Clothing workers
• 1 Economic conditions
• 1 European Union
• 1 Hotels
• 1 Labor
• 1 Party of European Socialists
• 1 Political activity

• 7 Partito socialista italiano
• 2 Centro ligure di storia sociale
• 2 Federazione socialista milanese
• 2 Fondazione Lelio e Lisli Basso-ISSOCO
• 2 International Workers in the Amalgamated Food Industries
• 1 Amalgamated Food Workers
• 1 Centro Socialista Obrero de Bahía Blanca
• 1 Centro Socialista de S. Paulo
• 1 Centro per la storia del movimento operaio e socialista in Liguria
• 1 Centro storico uomini rappresentativi del socialismo
• 1 Centro studi e iniziative per la riforma dello Stato (Italy)
• 1 Cherubini, Donatella
• 1 Corpo dei volontari della libertà (Italy). Giustizia e libertà
• 1 Fondazione Giangiacomo Feltrinelli
• 1 Fondazione Giangiacomo Feltrinelli. Biblioteca
• 1 Fondazione Giuseppe Emanuele e Vera Modigliani
• 1 Fondazione di studi storici "Filippo Turati"
• 1 Fry Collection of Italian History and Culture
• 1 Gruppo "Pensiero e Azione" (São Paulo, Brazil)
• 1 Gruppo Lavoriamo
• 1 Industrial Workers of the World
• 1 International Communist Party
• 1 International Federation of Workers in the Hotel, Restaurant, Club and Catering Industry
• 1 Istituto Giangiacomo Feltrinelli
• 1 Italian Socialist Club of Chicago

• 8 French
• 8 Spanish
• 7 English
• 5 German
• 4 Unknown
• 3 Portuguese
• 2 Russian
• 1 Multiple languages
• 1 Romanian

• 29 Italy
• 8 Argentina
• 5 Brazil
• 5 United States
• 3 Chicago
• 3 Illinois
• 2 Europe
• 2 Pennsylvania
• 2 Philadelphia
• 1 Bahia Blanca
• 1 Calumet
• 1 European Union countries
• 1 France
• 1 Michigan
• 1 New York
• 1 New York (State)
• 1 Sardinia

• 54 Periodicals
• 7 Newspapers
• 1 Congresses
• 1 Periodical
• 1 Sources
• 1 periodicals

Limit year range