Code of practice for installation and maintenance of escalators / 
BIS. 
 - 4th ed 
 - New Delhi :  Bureau of Indian Standards ,  1968. 
 - 13p;21cm 
<br/><br/>Includes bibliogrphies and index. 
<br/><br/><label>ISBN: </label>1234567813 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Civil engineering
<br/><br/><label>Dewey Class. No.: </label>658.5620954 BUR