TY  - BOOK
AU  - Knoll, Andrew H.  .
TI  - Life on a young planet : the first three billion years of evolution on earth / 
SN  - 0-691-12029-3
U1  - G1:66 
PY  - 2003///
CY  - New Jersey : 
PB  - Princeton University Press , 
KW  - Life- Origin
ER  -