TY  - BOOK
AU  - Lapo,A.V.
AU  - Purto,V.A.
AU  - Juswigg,T.
TI  - Traces of bygone biospheres
U1  - 574.5 22
PY  - 1987///
CY  - Moscow
PB  - Mir Pubs.
KW  - Geology
KW  - Popular works
ER  -