TY  - BOOK
AU  - Gray, Ralph and others
TI  - Our violent earth
U1  - 551.22 
PY  - 1982///
CY  - Washington
PB  - National Geographic Society
KW  - Sciences
KW  - Earthquakes
KW  - Volcanoes
KW  - Water
KW  - Stormy weather
ER  -