TY  - GEN
AU  - Masters,Gilbert M.
AU  - Ela, Wendell P.
TI  - Introduction to environmental engineering and science
SN  - 9788120336919
U1  - 628 
PY  - 2014///
CY  - Delhi
PB  - PHI Learning
KW  - Environmental  Sciences
KW  - Environmental engineering
KW  - Environmental protection
ER  -