TY  - BOOK
AU  - Sin autor, 
AU  - Hodgsin, J. , edit.
TI  - The ecology and management of grazing systems : :  / 
SN  - 851993028
PY  - 1998///
CY  - Washington ; 
PB  - CAB International , 
KW  - ECOLOGIA
KW  - SISTEMAS PASTORILES
ER  -