TY  - BOOK
AU  - "United Nations, Economic Commission for Asia and the Far East"
ED  - "United Nations, Economic Commission for Asia and the Far East"
TI  - Manual on traffic surveys
U1  - "X411.1.N7t4, L1" 
PY  - 1971///
CY  - New
PB  - York United Nations U. S. A.  
KW  - Road Transport Economics
N1  - Sales No. E.71.11.F.13
ER  -