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Book dossier
by Hugh W. McGee
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Código da estrada
Portugal.
Transportation infrastructure
United States. General Accounting Office
Truck
Donald Crews
Physical fitness
Bud Getchell
Wilkinson's road traffic offences
G. S. Wilkinson
Red light, green light
Margaret Wise Brown
The human factors of transport signs
Tim Horberry
Traffic Signs Manual
Dept.of Transport
D.C. Investigation
United States. Congress. House. Committee on the District of Columbia
Time-based coordination of traffic signals
Owen Curtis
