Kember-Smith, J. <br/><br/>
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 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Traffic surveys
<br/><br/><label>LC Class. No.: </label>TE7 T72 no. 431