TY  - BOOK
AU  - Cunningham,William P.
AU  - Cunningham,Mary Ann
TI  - Principles of environmental science: inquiry and applications 
SN  - 0071214496 (ISE)
PY  - 2009///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - Environmental sciences
N1  - Includes index
ER  -