TY  - BOOK
AU  - O'Neill,R.V.
TI  - A hierarchical concept of ecosystems
T2  - Monographs in population biology
SN  - 0691084378 (pbk)
U1  - 574.5 
PY  - 1986///
CY  - Princeton, NJ
PB  - Princeton University Press, 
KW  - COMUNIDADES BIOTICAS
ER  -