TY  - BOOK
AU  - Wright,R.Gerald
TI  - National parks and protected areas: their rolo in environmental protection 
SN  - 0-86542-496-9
AV  - SB482 .A4 N38
PY  - 1996///
CY  - Cambridge, Mass.
PB  - Blackwell Science
N1  - Incluye bibliografia
ER  -