TY  - GEN
AU  - National research council 
TI  - Toward sustainable agricultural systems in the 21st century: committee on twenty-first century systems agriculture board on agriculture and nutural resources division on earth and life studies
SN  - 9780309148962
U1  - 630.973 
PY  - 2010///
CY  - Washington
PB  - The National Academic Press
KW  - Agricultural systems
KW  - Sustainability
KW  - Sustainable agriculture
ER  -