Ahuja, T. D. Birdi, G S <br/><br/>
Roads, Railways, Bridges and Tunnel Engineering 

 - Delhi  Standard Book House  1980 
 - p.692 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Road Engineering<br/>Ballast
<br/><br/><label>Dewey Class. No.: </label>625.7 A2874R