TY  - BOOK
AU  - Berry,William B.N.
TI  - Growth of a prehistoric time scale, based on organic evolution
AV  - QE508.B534.G769 1968 
PY  - 1968///
CY  - San Francisco
PB  - W. H. Freeman
KW  - Geological time
N1  - 4; Bibliography: pages 147-152; 2
ER  -