TY  - BOOK
ED  - Indian standards institution                                                                                                                                                                                                                                   . 
TI  - Method of measurement of building and civil engineering works. Part-9 roof covering,IS:1200-1973 
U1  - 69.003 
PY  - 1988///
CY  - New Delhi : 
PB  - Indian Standards Institution , 
ER  -