TY  - BOOK
AU  - Bureau of Indian Standards[BIS]
TI  - IS:1200-(Pt.20)-1981. Indian standard method of measurement of building and civil engineering works. Pt.20 : laying of gas and oil pipe lines
U1  - IS CODE 
PY  - 1993///
CY  - New Delhi
PB  - Bureau of Indian Standards
N1  - ENG
ER  -