Gillespie,Thomas D Queiroz,Cesar A.V Sayers,Michael W <br/><br/>
International road roughness experiment  Establishing correlation and a calibration standard for measurements / Michael W.Sayers,Thomas D.Gillespie and Cesar A.V. Queiroz 

 - Washington  World Bank  1986 
 - ix, 453p. 
 - World technical paper .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads<br/>Roads - riding qualities - measurement<br/>Roads - surface roughness - measurement