TY  - BOOK
TI  - Understanding earth
SN  - 9780716776963
U1  - 551.8 22
PY  - 2007///]
CY  - New York : 
PB  - W.H. Freeman
KW  - Earth sciences
KW  - BUEsh
KW  - Reading book
N1  - Includes bibliographical references and index
ER  -