TY  - BOOK
AU  - George M Van Dyne
TI  - Ecosystem concept in natural resource management
U1  - 574.5 
PY  - 1969///
CY  - New York
PB  - Academic Press
N1  - George M Van Dyne: Ecosystem concept in natural resource management.  New York.  Academic Press, 1969.--(574.5VAN)
ER  -