• 6 Microforms

• 4 Labor unions
• 1 Economic conditions
• 1 History
• 1 Industrial statistics
• 1 Labor laws and legislation
• 1 Manufacturing industries

• 3 Pennsylvania. Department of Labor and Industry
• 2 Erie Industrial Union Council
• 1 Beaver Valley Labor History Society
• 1 Bradford Trades Assembly (Pa.)
• 1 Industrial Republic (Organization)
• 1 Pennsylvania. Bureau of Industrial Statistics
• 1 Pennsylvania. Commissioner of Labor and Industry
• 1 Pennsylvania. Department of Internal Affairs
• 1 Pennsylvania. Industrial Board
• 1 Socialist Labor Party of Philadelphia (Pa.)

• 13 English

• 4 Pennsylvanie
• 2 Erie
• 2 Philadelphia
• 2 Philadelphia (Pa.)
• 1 Allentown
• 1 Bradford
• 1 Philadelphie

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