TY  - BOOK
AU  - Levin,Harold L.
TI  - The earth through time
T2  - Saunders golden sunburst series
SN  - 0030536898
AV  - QE28.3.L4 1991 
PY  - 1991///
CY  - Fort Worth
PB  - Saunders College Pub.
KW  - Historical geology
N1  - Includes bibliographical references and index
ER  -