TY  - BOOK
AU  - Bureau of Indian Standards[BIS]
TI  - IS:12592-(Pt.2)-1991. Indian standard precast concrete manhole covers and frames specification. Pt.2 : frames
U1  - IS CODE 
PY  - 1991///
CY  - New Delhi
PB  - Bureau of Indian Standards
N1  - ENG
ER  -