TY  - BOOK
AU  - Cunningham W. P.
AU  - Cunningham M. A.
TI  - Principles of environmental science: inquiry and applications 
SN  - 9780077339333
AV  - GE105.C8 2009 
PY  - 2009///
CY  - New York
PB  - McGraw-Hill companies
ER  -