TY  - BOOK
ED  - Indian standards institution                                                                                                                                                                                                                                   . 
TI  - Specification for unreinforced corrugated and semi corrugated asbestos cement sheets ,IS:459-1970 / 
U1  - 691.326 
PY  - 1981///
CY  -  : 
PB  - ISI , 
ER  -