TY  - BOOK
AU  - Erwin, Douglas H
TI  - Extinction: how life on earth nearly ended 250 million years ago
SN  - 9780691136288
U1  - 576.84 ERW 
PY  - 2008///
CY  - Princeton, NJ
PB  - Princeton University Press
KW  - Geology, Stratigraphic
KW  - Paleontology, Stratigraphic
KW  - Permian Geologic Period
N1  - Includes bibliographical references and index
ER  -