• 11 Wisconsin Historical Society Library
• 10 Law Library

• 10 Books
• 5 Journals, Magazines, Newspapers
• 1 Microforms

• 6 United States. Internal Revenue Service
• 4 Tax evasion
• 3 Income tax
• 2 Automation
• 2 Data processing
• 2 Research
• 2 Tax revenue estimating
• 2 Taxpayer compliance
• 1 Economic conditions
• 1 Electronic filing of tax returns
• 1 Electronic filing systems
• 1 Indians of North America
• 1 Information Systems
• 1 Information storage and retrieval systems
• 1 Tax administration and procedure

• 1 ICF Incorporated
• 1 United States. General Accounting Office
• 1 United States. Internal Revenue Service. Research Division
• 1 University of Michigan. Institute for Social Research

• 13 English
• 2 Spanish

• 8 États-Unis

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