TY  - BOOK
AU  - Boucot,Arthur J.
TI  - Evolution and extinction rate controls
AV  - QE796.B675 
PY  - 1975///
CY  - Amsterdam
PB  - : Elsevier
KW  - Brachiopoda,
KW  -  fossil,
KW  - Invertebrate,
KW  - fossil,
KW  - Evolution (biology)
ER  -