TY  - SER
AU  - Thomas Boersma,K.
TI  - Devonian and lower Carboniferous conodont biostratigraphy, central Spanish Pyrenees
PY  - 1973///
CY  - Leiden
PB  - Rijksuniversiteit Leiden
KW  - RMCA
KW  - GG General geology
KW  - Issue
ER  -