TY  - GEN
AU  - Masters Gilbert M
AU  - Ela Wendell P
TI  - Introduction to environmental engineering and science
SN  - 9788131723265
U1  - 628:504 
PY  - 2008///
CY  - Delhi
PB  - Dorling kindersley
KW  - Environmental engineering
KW  - 628:504
ER  -