TY  - GEN
AU  - Cunningham , William P.
AU  - Cunningham , Mary Ann
TI  - Principles of environmental science: inquiry and applications
SN  - 0070581126
U1  - 363.7 
PY  - 2004///
CY  - New Delhi
PB  - Tata McGraw-Hill
KW  - ENVIRONMENTAL PROBLEMS
KW  - SOCIAL PROBLEMS
ER  -