TY  - BOOK
AU  - Donovan,S.K.
TI  - Mass extinctions: processes and evidence 
SN  - 1852930594 :
U1  - 591.5 
PY  - 1989///
CY  - London
PB  - Balhaven Press
KW  - Extinction (Biology)
KW  - Science
KW  - Earth Sciences
KW  - Geology
KW  - Paleontology
N1  - Includes bibliographical references and index
ER  -