TY  - BOOK
AU  - Keller,Edwrad A
TI  - Environmental geology / 
SN  - 0023632704
U1  - 301.31  
PY  - 1992///.
CY  - New York : 
PB  - Macmillan Publishing Company, 
KW  - Ecology.
KW  - Environment.
KW  - Geology.
ER  -