TY  - BOOK
AU  - Adler,Irving
AU  - Adler,Ruth
TI  - The earth's crust
T2  - The Reason why series
AV  - PZ10.A3 Ear
U1  - 551.1 (j) 
PY  - 1963///]
CY  - New York
PB  - John Day Co.
KW  - Earth
KW  - Surface
KW  - Juvenile literature
ER  -