TY  - BOOK
AU  - Birdi, G.S.
TI  - Water supply and sanitary engineerig
U1  - 628.1 
PY  - 1968///
CY  - Delhi
PB  - ; Dhanpat Rai And Sons
KW  - Engineering
KW  - Sanitary Engineering
KW  - Water Supply
ER  -