TY  - GEN
AU  - Connor , David, J. 
AU  - Loomis, Robert, S.
AU  - Cassman, Kenneth, G.
TI  - Crop ecology: productivity and management in agricultural systems
SN  - 9780521744034
U1  - 630.277 
PY  - 2011///
CY  - New York
PB  - Cambridge university press
KW  - AGRICULTURAL SYSTEMS
KW  - ECOLOGY
KW  - AGRICULTURE
ER  -