Speed profiles and time delay at railhighway grade crossings /
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| Format: | Book |
| Language: | English |
| Published: |
Springfield Va. :
National Technical Information Service U S, Departamento of Commerce,
1973.
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| Series: | Report
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| Subjects: |
| Physical Description: | 107, [4] hojas : ilustraciones ; 29 cm.-- |
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