TY  - GEN
AU  - Cunningham , William  P.
AU  - Cunningham , Mary  Ann
TI  - Principles of environmental science     : inquiry and applications
SN  - 0070647720
U1  - 363.7 
PY  - 2008///
CY  - New Delhi
PB  - Tata Mcgraw-Hill 
KW  - ENVIRONMENTAL SCIENCES
UR  - www.tatamcgrawhill.com
ER  -