TY  - BOOK
AU  - Mackenzie,Fred T.
TI  - Our changing planet: an introduction to earth system science and global environmental change 
SN  - 0-13-271321-7
AV  - GE105 M32 1998
PY  - 1998///
CY  - Upper Saddle River, N. J.
PB  - Prentice Hall
N1  - Incluye bibliografia
ER  -