• 1 UW Archives
• 1 Wisconsin Historical Society Archives

• 112 Labor unions
• 25 Postal service
• 19 Railroads
• 14 Printing industry
• 9 Telephone companies
• 8 Food industry and trade
• 8 Telecommunication
• 6 Aerospace industries
• 6 Building trades
• 6 Employees' magazines, newsletters, etc
• 6 Metal-workers
• 5 Letter carriers
• 5 Locomotive engineers
• 5 Locomotive firemen
• 5 Printers
• 5 Shipbuilding industry
• 5 Societies, etc
• 4 Boiler-makers
• 4 Clerks (Retail trade)
• 4 Local transit
• 4 Machinists
• 3 Airlines
• 3 Amalgamated Transit Union
• 3 Construction workers

• 4 Brotherhood of Locomotive Firemen and Enginemen
• 4 Brotherhood of Maintenance of Way Employees
• 4 International Typographical Union
• 2 American Communications Association
• 2 Brotherhood of Boiler Makers and Iron Ship Builders of America
• 2 Brotherhood of Railway, Airline, and Steamship Clerks, Freight Handlers, Express, and Station Employes
• 2 Communications Workers of America
• 2 General Telephone Company of Wisconsin
• 2 International Brotherhood of Boiler Makers, Iron Ship Builders, and Helpers of America
• 2 International Typographical Union. Local No. 13 (Boston, Mass.)
• 2 Order of Railway Conductors and Brakemen
• 2 Retail, Wholesale, and Department Store Union
• 2 Transportation Communications International Union
• 1 AFL-CIO. Building and Construction Trades Department
• 1 AFSCME. Local 952 (Milwaukee, Wis.)
• 1 Affiliated Construction Trades Foundation
• 1 Allen-Bradley Company
• 1 Alliant Techsystems
• 1 Amalgamated Association of Street and Electric Railway Employees of America
• 1 Amalgamated Association of Street, Electric Railway and Motor Coach Employees of America
• 1 Amalgamated Lithographers of America
• 1 Amalgamated Meat Cutters and Retail Food Store Employees Union, Local 342
• 1 Amalgamated Transit Union. Convention
• 1 Amalgamated Transit Union. General Executive Board
• 1 Amalgamated Transit Union. International President

• 2 French

• 52 United States
• 17 Wisconsin
• 9 California
• 9 New York (State)
• 7 New York
• 5 Madison
• 4 Massachusetts
• 4 Ohio
• 3 Boston
• 3 Canada
• 3 Michigan
• 3 Missouri
• 3 Pennsylvania
• 3 Washington (State)
• 2 Cleveland
• 2 Connecticut
• 2 Florida
• 2 Iowa
• 2 Los Angeles
• 2 Maryland
• 2 Milwaukee
• 2 Minnesota
• 2 San Francisco
• 2 Seattle
• 2 Washington (D.C.)

Limit year range