TY  - BOOK
AU  - Enger, Eldon D. , Bradley F. Smith
TI  - ENVIRONMENTAL SCIENCE:A STUDY OF INTERRELATIONSHIPS 
SN  - 9790070171664
AV  - GE 105  E54 2008
PY  - 2008///
CY  - MC Graw Hill
PB  - Boston
ER  -