Cooper, Roger A.
The Ordovician time scale - calibration of graptolite and conodont zones - Prague Univerzita Karlova 1999 - pp. 1-4 ilus.
BIOESTRATIGRAFIA
CONODONTA
GRAPTOLITES
ORDOVICICO
The Ordovician time scale - calibration of graptolite and conodont zones - Prague Univerzita Karlova 1999 - pp. 1-4 ilus.
BIOESTRATIGRAFIA
CONODONTA
GRAPTOLITES
ORDOVICICO