TY  - BOOK
AU  - Bureau of Indian Standards[BIS]
TI  - IS:10990-[Pt.3]-2001: ISO:6412-[Pt.3]-1993. Indian standard technical drawings : simplified representation of pipelines. Pt.3 : terminal features of ventilation and drainage systems. 
U1  - IS CODE 
PY  - 0000///2
CY  - New Delhi
PB  - Bureau of Indian Standards
ER  -