TY  - BOOK
AU  - Denison RH
TI  - Cyathaspididae: a family of of silurian and devonian jawless vertebrates
U1  - 567 
PY  - 1964///
CY  - Chicago
PB  - Natural History Museum
KW  - Jawless vertebrates
KW  - Vertebrates
N1  - Published in Fieldiana : Geology v13 no 5
ER  -