TY  - BOOK
ED  - International Union for Conservation of Nature and Natural Resources
TI  - Caring for the earth: : a strategy for sustainable living
U1  - 333.72 
PY  - 1991///
CY  - Gland, Switzerland
PB  - The Union
KW  - Desarrollo sustentable
KW  - Medio ambiente
KW  - Protección
KW  - Recursos naturales
KW  - Conservación
ER  -