TY  - BOOK
AU  - Duvigneaud P Ed.
ED  - International conference on productivity of forest ecosystems (1969 : Brussels)
TI  - Proceeding on productivity of forest ecosystems
T2  - Ecology and conservation; 4
U1  - JB:95p1,N69, L1 
PY  - 1971///
CY  - Paris         
PB  - Unesco
KW  -  Forestry
KW  - Agriculture
ER  -