Social, economic, and environmental factors of transportation 20 reports.
| Erakunde egilea: | |
|---|---|
| Formatua: | Liburua |
| Hizkuntza: | English |
| Argitaratua: |
Washington, D.C.
Highway Research Board, National Research Council
c1971.
|
| Saila: | Highway research record
no. 356. |
| Gaiak: |