TY  - BOOK
TI  - Firewood crops: Shrub and tree species for energy production 
U1  - 634.958217 21
PY  - 1980///
CY  - Washington:   
PB  - National academy of sciences, 
KW  - LEMB
KW  - AGRICULTURA
KW  - RÉGIMEN EN LA AGRICULTURA
KW  - MEJORAMIENTO SELECTOS DE PLANTAS
ER  -