TY  - BOOK
AU  - Sergeev,V.N.
ED  - Russian academy of sciences.
TI  - Microfossils in cherts from Precambrian and Cambrian of Southern Ural Mountains and Middle Asia
T2  - Memoir
SN  - 0 11 884515 2
PY  - 1992///
CY  - Moscow
PB  - Nauka
ER  -