TY  - BOOK
AU  - Petrie,Jean
AU  - Hardy,David A.
TI  - The earth
U1  - 030 
PY  - 1967///
CY  - London
PB  - Oxford University Press
KW  - Children's encyclopedias and dictionaries
KW  - Encyclopedias and dictionaries
N1  - Includes index
ER  -