TY  - BOOK
AU  - Kember-Smith, J.
TI  - 50-point census operators guide: a supplement to RRL report no. 9
AV  - TE7 T72 no. 431 
PY  - 1978///
CY  - Crowthorne, Berkshire
PB  - Transport and Road Research Laboratory
KW  - Traffic surveys
ER  -