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VMS - Variable Message Signs : a Litterature Review

Statens väg- och transportforskningsinstitut (Linköping, Suède).Sara NygårdhsGabriel Helmers

出版	Swedish National Road and Transport Research Institute, 2007
URL	http://books.google.com.hk/books?id=VvF5zQEACAAJ&hl=&source=gbs_api