Traffic surveys by post cards.
| Autor corporatiu: | |
|---|---|
| Format: | Llibre |
| Idioma: | English |
| Publicat: |
Washington, D.C.
Highway Research board, Division of Engineering and Industrial Research, National Research council
1951.
|
| Col·lecció: | Highway Research Board
Bulletin 41. |
| Matèries: |