Sayers, Michael. <br/><br/>
Guidelimes for conducting and calibrating road roughness measurement. 

 - Washington :  World Bank,  1986. 
 - World Bank Technical Paper No. 46 .
<br/><br/> This paper gives guidelines for assessing roads. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads.<br/>Roads -- Road meter.--Roads -- Road meter.