TY  - BOOK
AU  - Erickson,Jon
TI  - A history of life on earth: understanding our planet's past 
T2  - The changing earth series
SN  - 0816031312 (acid-free paper)
AV  - QE28.3 .E75 1995
U1  - 560 20
PY  - 1995///
CY  - New York
PB  - Facts on File
KW  - Historical geology
N1  - Includes bibliographical references (p. 230-236) and index
ER  -