TY  - BOOK
AU  - Cowie J W Ed.
AU  -  Brasier M D Ed.
TI  - Precambrain-cambrian boundary
T2  - Oxford monographs on geology and geophysics; 12
U1  - H51, M9 
PY  - 1989///
CY  - Oxford
PB  - Clarendon Press        
KW  -  Precambrian
KW  - Stratigraphy
ER  -