Road research 

 - 1953 
 - His Majesty's Stationery Office  London  1953 
 - 16p. 
 - road note no.15 .
<br/><br/><label>Nat. Bib. No.: </label>2113 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Engineering
<br/><br/><label>Universal Decimal Class. No.: </label>625.712  / SPE