TY  - BOOK
AU  - Canby,Thomas Y.
ED  - National Geographic Society (U.S.).
TI  - Our changing Earth
SN  - 0870449109
AV  - GE195 .C36 1994
U1  - 363.7 20
PY  - 1994///
CY  - Washington, D.C.
PB  - The Society
KW  - Environmentalism
KW  - Environmental degradation
KW  - Citizen participation
KW  - Nature
KW  - Effect of human beings on
KW  - Conservation of natural resources
KW  - Proteção ambiental
KW  - larpcal
N1  - Includes index
UR  - http://www.archive.org/details/ourchangingearth00canb
UR  - http://www.openlibrary.org/books/OL1436300M
ER  -