• 5 Middleton Shelving Facility
• 3 Wendt Commons Library - Closed
• 2 Law Library
• 1 WHS State Archives Preservation Facility
• 1 Wisconsin Historical Society Library

• 6 Air traffic control
• 6 United States. Federal Aviation Administration
• 3 Abbreviations
• 3 Aeronautics
• 3 Aids to air navigation
• 3 Airplanes
• 3 Airports
• 3 Dispatching
• 3 Patent laws and legislation
• 3 Patent practice
• 3 United States. Patent and Trademark Office
• 2 Communication and traffic
• 2 United States. Patent Office
• 1 Aeronautical radio stations
• 1 Charitable uses, trusts, and foundations
• 1 Management
• 1 Nonprofit organizations
• 1 Tax exemption
• 1 Taxation
• 1 Traffic control
• 1 United States. Internal Revenue Service

• 6 Air Traffic Organization (U.S.). System Operations Services
• 6 United States
• 6 United States. Federal Aviation Administration
• 5 United States. Air Traffic Rules and Procedures Service
• 4 United States. Air Traffic Operations Service
• 4 United States. Air Traffic Service
• 3 United States. Patent and Trademark Office
• 2 United States. Patent Office
• 1 Air Traffic Airspace Management Program (U.S.)
• 1 Air Traffic Organization (U.S.). Mission Support Services
• 1 United States. Internal Revenue Service

• 10 English

• 10 United States
• 1 Canada
• 1 États-Unis

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