TY  - BOOK
AU  - Enger,Eldon D.
AU  - Smith,Bradly F  .
TI  - Environmental science : a study of interrelationships / 
U1  - 628 
PY  - 2000///
CY  - New Delhi : 
PB  - McGraw Hill , 
KW  - ENVIRONDENTAL-SCIENCE
N1  - Include index
ER  -