TY  - BOOK
AU  - Cunningham, William P.
AU  - Cunningham, Mary Ann
TI  - Principles of environmental science : inquiry and applications
SN  - 0070581126
U1  - 363.7 
PY  - 2003///
CY  - New Delhi
PB  - Tata McGraw Hill Pub. Co. Ltd.
ER  -