50-point census operators guide : a supplement to RRL report no. 9

Kember-Smith, J.

50-point census operators guide : a supplement to RRL report no. 9 - Crowthorne, Berkshire : Transport and Road Research Laboratory, 1978 - 6 p - Transport and Road Research Laboratory. TRRL supplementary report ; no. 431 .


Traffic surveys

TE7 T72 no. 431
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