TY  - BOOK
ED  - Scientific American
TI  - The planet Earth
U1  - 551 
PY  - 1957///
CY  - New York
PB  - Simon and Schuster
KW  - Geophysics
KW  - Earth : Geophysics
KW  - International Geophysical Year, 1957-1958
KW  - Earth
ER  -