TY  - BOOK
AU  - Cunningham, William P.
AU  - Cunningham, Mary Ann
TI  - Principles of environmental science: inquiry & applications 
SN  - 9780070647725:
U1  - 628 22
PY  - 2003///
CY  - New Delhi
PB  - McGraw-Hill, 
KW  - Environmental sciences -- Textbooks
N1  - Includes index
ER  -