International transportation topics 4 reports ; sign uniformity, closing the Darien gap, transportation in Europe, and transportation in Great Britain.
| निगमित लेखकों: | , , |
|---|---|
| स्वरूप: | पुस्तक |
| भाषा: | English |
| प्रकाशित: |
Washington
Highway Research Board
D.C., 1969.
|
| श्रृंखला: | Highway research record
no. 299. |
| विषय: |