The changeable-message concept of traffic control report of a conference held July 15-16, 1971.
| التنسيق: | كتاب |
|---|---|
| اللغة: | الإنجليزية |
| منشور في: |
Washington, D.C.
Highway Research Board, National Research Council
1972.
|
| سلاسل: | Special report (National Research Council (U.S.). Highway Research Board)
129. |
| الموضوعات: |