Sayers, Michael W. <br/><br/>
Guidelines for conducting and calibrating road roughness measurement 
By Michael W. Sayers, Thomas D. Gillespie and William D.O. P 
 - Washington, D.C.  IBRD  1986 
 - 87p. 
 - World Bank Technical Paper, 46 .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Roads
<br/><br/><label>Dewey Class. No.: </label>X6 In8g