TY  - BOOK
ED  - Indian standards institution 
TI  - Code of practice for installation and maintenance of escalators
U1  - 621.876:696.6 
PY  - 1968///
CY  - New Delhi
PB  - Indian standards institution 
KW  - IS:4591-1968
N1  - 3rd reprint April 1989
ER  -