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Traffic signs and signals -- United States
Referred from 13 books

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Traffic signal operations near highway-rail grade crossings
Hans W. Korve
Publisher: Washington, D.C. : National Academy Press, 1999.
ISBN: 030906824X   LCC: HE1617  

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  1. "Traffic signs and signals" -- Topical Term, 650/a
    Similar Subjects:
      Traffic signs and signals (124)
      Traffic signs and signals -- Congresses (40)
      Traffic signs and signals -- Juvenile literature (15)
      more...

  2. "United States" -- Geographic, 650/z
    Similar Subjects:
      History -- Americas -- United States -- General (6551)
      History -- Americas -- United States -- General AAS (4603)
      United States -- Race relations (3594)
      more...


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