TY  - BOOK
AU  - Cunningham,William P.
AU  - Cunningham, Mary Ann
TI  - Principles of Environmental Science: inquiry and applications 
SN  - 0072452706
PY  - 2002///
CY  - Boston
PB  - McGraw Hill
KW  - Environmental science
N1  - Includes bibliographical references and index
ER  -