TY  - BOOK
AU  - Keller,Edward A., x
AU  - x
TI  - Environmental geology : x
SN  - x 
U1  - 550/KEE 
PY  - 1979///
CY  - Columbus 
PB  - Charles E. Merrill 
KW  - Geology
KW  - Earth
N1  - Includes
ER  -