TY  - BOOK
AU  - Singh,Alam
AU  - Sharma,U.S.
TI  - Current practices in environmental science and engineering
SN  - 09700668
U1  - 628 22
PY  - 1987///
CY  - Delhi
PB  - IBT Pub.
KW  - Drawing
KW  - Engineering drawing
N1  - Include index
ER  -