Gillespie,Thomas D Paterson,William D.O Sayers,Michael W <br/><br/>
Guidelines for conducting and calibrating road roughness measurements / Michael W.Sayers,Thomas D.Gillespie and William D.O.paterson 

 - Washington  World Bank  1986 
 - vi, 87p. 
 - World Bank technical paper .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Road meters - calibration<br/>Roads<br/>Roads - riding qualities - testing