TY  - BOOK
ED  - Indian standards institution                                                                                                                                                                                                                                   . 
TI  - Specification for high density polyethylene pipes for portable water supplies sewage and industrial effluents  IS:4984-1987 / 
U1  - 621.643 
PY  - 1987///
CY  - New Delhi : 
PB  - Indian standards institution , 
ER  -