TY  - BOOK
AU  - Sokolov B S Ed.
AU  -  Fedonkin M A Ed.
TI  - Vendian system
U1  - H51.58, N0.2 
PY  - 1990///
CY  - Berlin
PB  - Springer-Verlag         
KW  -  Stratigraphy
KW  - Precambrian
ER  -