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Subject
- Air travel.1
- Airplanes--Takeoff.1
- Airplanes--United States.1
- Automobile driving.1
- Boats.1
- Chicago (Ill.)--Description and travel.1
- Cleveland (Ohio)--Buildings, structures, etc.1
- Family vacation.1
- Historic sites.1
- Kentucky--Description and travel.1
- Lakes.1
- Locks (Hydraulic engineering) Michigan.1
- Locomotion (Steam locomotive)2
- Locomotives.2
- Mammoth Cave (Ky.)--Description and travel.1
- Men.1
- Miniature objects.1
- Motels.1
- Mount Washington Cog Railway.1
- Mountains.2