TY  - BOOK
AU  - Donovan, Stephen K.
TI  - Mass extinctions : : processes and evidence 
SN  - 1852930594
U1  - 576.84 MAS 23
PY  - 1989///
CY  - London
PB  - Belhaven Press
KW  - Mass extinctions
KW  - Extinction (Biology)
KW  - Paleontology
N1  - Includes bibliographical references and index
ER  -